Venaseal drawbacks which i am suffering from today

I have been through venaseal treatment for both of my legs on 30/10/24..... Immediately when the procedure got over I got severe to severe headache till 2 week, during which i was not able to sit or stand at all and I used to lie down and had couple of strong medicines for the same ....as prescribed by doctor ....till than I am facing allergy all over my body since 3 months approximately for which again I am taking medicines The redness comes all over suddenly and it gets over automatically I am really frustrated with these allergic reactions. I want to know why it is coming and why I am having severe pain in legs and knee suddenly after the treatment the doctor told me that there will be no pains after treatment now after I have got this treatment done doctor is not answering my calls I am really worried can someone pls help me for god sake.