Fake contact & Fake singnature

Hi. This is md Hafizul asad, nif : xxxxxxxxx, I used nos internet connection 1 years 26€ . But some one make a new fake contact & use Fake my singnature. They send unacceptable bill. I was contact with nos & they send contact paper , which is totally fake. I didn’t do any contact or any singnature. That time I was COVID affected. I was in isolation. Please cancel my new fake contact & activate my old contact. Thanks