Assigned my cell number to someone else and have not resolved it in over a month!!!

My cell phone number was assigned to someone else on a contract while i was personally using it. Then I called in to raised an incident with the call center and it has been over a month and nothing has been resolved. This number is linked to everything in my life. I have even suffered at work due to this as this number was also used for work purposes. I cannot receive emails, sms's, whatsapps, etc and this is damaging my professional, financial and social life.

Each time i call in, they just say "sorry" but do nothing about it. They promise feedback, but no feedback to date still. I feel this is really pathetic service and very unprofessional. I could have lost interviews, i cannot make purchases online, i cannot use my cell phone banking, which is also a risk as the person that has my cell number now can use it for those things.

I even went to the Police Station and got an Affidavit (REF: S4-OTK27-7ZZ6S) to get this resolved and still nothing has happened.

It needs to be sorted and i feel i need to be compensated for any losses during the past month i have experienced due to this.