MTN BILLING AND SUSPENDING MY ACCOUNT !!!!

Contract expires [#***] URGENT I gave MTN in November my notice for cancellation and not to renew my mtn contracts which expired on the 3rd of December. My number is now suspended and i am using my number still for my businesses. MTN also billed me after my notices.... THIS IS UNACCEPTABLE AND HIGHLY ***********. MTN I NEED THIS MATTER RESOLVED ASAP!!!!

I CANT EVEN GET THROUGH TO RETENTIONS VIA 135!!!!

***