no responce

Autopage took over Nashua Mobile without me receiving any correspondence. At Carnival city Mall I spoke to Vusi explained everything to him that I was still making payment to Nashua Mobile - he informed me they took over in Nov'14. I send him emails of proof of payment while sitting in the branch he advised me he will send it to there head office to get it sorted out. He only took my email to send me invoices on the account.. And that was the last I heard of him. I also requested for the contract to be cancelled. I made payment to Autopage (got there bank details on there web)- still with no correspondence on the previous payment. A friend visited the branch a month ago spoke to Fatima explained everything again. We send the emails and proof of payment all over again. No correspondence was received from them? I started emailing Autopage customer service with all the emails I send to Vusi and all the proof of payment - I received an email it has been send to there accounts dept. I have send emails for the past 2 weeks requesting final account and want confirmation of cancellation. No correspondence from them - I get phone calls threatening they will hand me over for bad debt??!!!