I had EVLT treatment twice and they came back again? Rope like veins from ankle to groin on left leg only.

When done correctly, the chance of a vein opening after EVLT is quite small.  It might be more likely that the diameter of the vein was large and the settings for treatment were too low and the vein never properly closed in the first place.  In many cases, EVLT alone is not a complete treatment.  If you can see the veins they are often tributary veins that would need to be treated with phlebectomy or sclerotherapy in addition to the EVLT.  I would recommend a repeat ultrasound which will also assess the tributary veins as well as the primary vein which was treated. 

if your procedure was done correctly the chance of the vein reopening is quite small. For you to have the type of varicose veins you described after 2 treatments is definitely not normal. I agree a second opinion and repeat ultrasound are in order. 

IF the EVLA is done correctly, those veins do not come back immediately.  You can get other veins over time and veins can recurr. I would recommend a new ultrasound to see what was closed and what is causing the problem or remains.  The EVLA procedure when done correctly is very successful and should not need to be redone immediately