I'm worried that the Botox was not injected in the proper place for my "elevens"??

I’m sorry to hear that you were unhappy with
your treatment. Since I was not there, I unfortunately cannot speak to where
your physician injected the Botox. You are correct that the Botox needs to be
injected into the muscles that cause the frowning movements, to help relax your
forehead so that you cannot form the “elevens”. If you find the treatment does not work, it is
possible that the Botox was not injected into the correct muscles.

I have been injecting Botox for aesthetic reasons, since 1991, which means that I have been treating the so-called "eleven" lines for twenty-three years, as this was the first location for its cosmetic use. In that time, I have consistently found Botox to begin working anywhere from between the following day and one week later (and rarely as long as two to three weeks later)--a time frame that usually remains pretty much about the same from treatment to treatment. Twenty units properly injected within the bodies of the appropriate muscles of the region typically do the trick. (Injecting the creases between the muscles would be far more appropriate for injecting hyaluronic acid products to treat the static wrinkles that result from years of dynamic contraction of those muscles.)Some additional thoughts: I have observed a very small number of individuals who seemed to have developed a relative resistance to Botox after several prior successful treatments. In other words, someone who has done well in previous treatments may find that they require more Botox to achieve the same results, or even need to be switched to another neuromodulator, such as Dysport or Xeomin to achieve those results. The presumed explanation, although not proven by any means, is the possible development of antibodies to the Botox. One recommended way to avoid this is to perform touch-ups no sooner than one month after treatment, rather than the two week interval usually recommended. The bottom line: seek treatment by a board certified core aesthetic physician with extensive experience in injecting neuromodulators. 

If your wrinkles are very deep to start, it may require a few rounds of Botox to smooth out the lines, I suggest being patient and waiting at least 10 days before re-injecting the area 

If you had Botox recently by another physician and it eliminated the 11 lines without the need for a filler, then there are few factors to consider.1.  Did you give it enough time?  Botox can take up to 7 to 10 days to fully kick in.  I would have waited before re injecting you.2.  Its possible the lines have become deeper with age, requiring a dermal filler along with the Botox such as Juvederm or Restylane.3.  It is possible that the injector is not experienced.  If you still have motion in the area treated after 10 days, this is something to consider.4.  Some practices are resorting to watering down or using fake Botox so that they can offer less expensive treatments to lure people in.  There are some safety precautions you can take.       a) Check that the expiration date on the vial and carton match up.  Does it say for human use?     b) Go to the FDA website to see if your doctor is listed on the fake Botox physician list.     c) Contact Allergan to see if your physician purchases Botox directly from them vs. third party.     d) If a to c is ok, then your doctor maybe watering down the Botox.Good luck and remember, be patient for the Botox to kick in, and make sure your physician is experienced, and using only real Botox at the right concentrations.

There are various techniques for injecting Botox. However, the best way to tell if it was done correctly will be by your result. If you can still frown after 20 more units, something may be wrong.