No Help offered

We have been trying unsuccessfully since 2016/01 to find a resolution to a cancelled contract. We try to call Billing dept no one answers, Went to the store they requested call back, and nothing, so how does one resolve issues when no one is there to assist, On telkom website, you just see an agent will assist shortly, but that never happens either. Device was returned and in store was told its on system that the contract was ceased due to no coverage and contract amount to be waived, but till date nothing, its shows we owe an amount which is not the case, can Telkom please get someone to assist. the amount of time that has lapsed since the start of this and no assistance offered is pathetic.