Pathetic service and incorrect billing

Can someone from Vodacom assist me to get this matter sorted please coz I'm really running out of patience. I've had a contract with Vodacom for the last 10 years or so, i went for an upgrade at Vodacom in Klerksdorp Flamwood walk center on the 27th December 2019. I took up insurance which I canceled on the 2 Jan 2020, I called vodacom on the 15th January 2020 after realizing that the full amount of insurance was added yo my bill and not the pro-rata amount. I was told that my query has been escalated for correction and to.my suprise my debit order went off on the 26th inclusive of the full insurance amount. I have been phoning vodacom ever since to get the matter sorted and every time I call I'm told that the query will be escalated and to date I haven't had any resolution to this matter. My bill for this month again includes the full insurance amount even though it was canceled 2nd January already. Can someone please tell me what the hell is going on.

As if that's not enough, I have been waiting for my free R500 accessories voucher since the 27th December which I haven't received to date. I always have to phone the Vodacom Flamwood walk center store in klerksdorp for an update, why? The service is very pathetic for lack of a better word.

Can I get the two queries above resolved speedily please.