Fraud on my account

I keep getting emails that my debit card is being charged. With multiple attempts I have had no luck at getting this issue resolved. Someone else’s account is linked into mine and they keep requesting her bill on my debit card. Today I got an email stating I will go into collections. I have disputed this since last Saturday. The 28th of march! I do not have mobile service and I do not want it either I can pay $25 for visible mobile (Verizon) I DO NOT WANT Mobile service and I am about to cancel my WiFi if yall do not have this straightened out within 48hours I promise you that! T-Mobile has unlimited for $35 I will be more than happy to go elsewhere!!!!