tELKOM NIGHTMARE CONTUNUES AS I AM WRONGLY BILLED

I took a phone with telkon mobile and ended up cancelling it due to poor service and faulty device.<br> <br> I returned the device within the 7 day grace period and they promised to cancel the contract and not charge me anything.I made the cancalation on the 5 of December 2014. Come December 15 R610 was taken from my Account , when I called to enquire The shop assistant appologised and promised to deal withthe matter. The matter was resolved but January 15 another R536 was taken from my account, i reversed the transaction from my side. Right now I have recieved the statement saying I owe telkom R5961.65, i have made phone calls and have been sent from pillar to post without me getting any assistance, in the branch they told me they can not assist me as it the billing department responsibility , the number they give me is a 6 digit number which I can not phone on my cell phone as well as on the land line as I am using the sisco system and not telkom , the only route I am left with is Consumer Proctetor,I REGRET THE DAY I DECIDED TO TAKE A PHONE WITH TELKOM BECAUSE I HAVE BEEN STRESSED AND FRASTRATED EVER SINCE DAY ONE UP UNTIL NOW FOR THE PHONE I HAD WITH ME JUST ONE WEEK