My muscles/skin are tight 6 months post dysport. Any suggestions?

Hello, I had Dysport injections over 6 months ago in my forehead and it did spread all over my face. Now when its wearing off - my face changing and I no longer look myself. On my skin weird stains appear and my whole face geting horribly tight, even my lips. I have now lower face asymmetry. This is just a nightmare. Will this tightness ever go away ?Also my skin feels like plastic, when will my face come back to normal if ever???? Done all tests, have no illness. IM HEALTHY PERSON.