Feeling extremely disappointed with an extra large chin implant

You will need to give it time as it is too soon to draw conclusions.  If you remain dissatisfied, the nice option about a chin implant is that it can be removed.

If the tape is still on, you cannot draw hard conclusions of the cosmetic results.  Even after the tape and sutures are removed, there will be swelling which takes weeks to subside.  If the chin implant is not right, it can be removed.  And jaw surgery, tho more involved could be the more appropriate procedure, but give yourself time to heal as you are very early in the healing process

It is way too soon to properly judge your surgery. There is still significant swelling that will resolve over the next few weeks. i would wait a while before judging the result. If you remain unhappy, it is always possible to replace the implant with a smaller one. Don't be too quick to react so that you don't make a change that you are unhappy with from the other direction of not being big enough.