RIPPING PEOPLE OFF

I was told mtn has cancelled the contract I had with them seeing as I was not getting the data I signed up for in the first place! It keeps on sending me invoices and has at a point debited my account! I have stopped using that contract SIM card and you people are still sending invoices for a SIM card I haven’t used in over 3months do t take me for a fool! Cancel that ****** thing and stop debiting my account! You take ur clients for a ride!!!