Vodacom LTE Home Internet-Cancellations

I wish I can give Vodacom -20 rating, we been struggling to cancel a LTE Home WIFI contract since we got the Contract in August due to insufficient coverage in our area , numerous phone calls(each that went on for 2 hours) because every time you explain your whole story they put you through to somebody else, then you explain your whole story again and they put you through again and again and AGAIN!!!!!!! with no luck, nobody seem to be able to assist, Consultant said we must go in to the store to cancel, we went in(keep in mind we don't stay close to the store) the lady at the store said we cannot do it in store we need to phone, phoned again the next day, they said they cannot cancel it over the phone because we took out the contract in store and not online, this is ridiculous, how is nobody able to assist us? why is the customer CARE, I want to know who is the best person to speak to, to cancel this contract??? Please DO BETTER Vodacom!!!!!!!!!!!!!!!!!!!!!!!!