Overdue Query/complaint

Vodacom has so many *********** agents and a bunch of *****. I cancelled insurance on my devices in January already and am being billed up to now. I have made more than 30 calls to try to resolve this and sent 15+ emails and my issue is still not resolved. I cancelled my debit order and paid them only what was due to them and now my services have been suspended. This is breach of contract. I have kept my end of the bargain and they can't keep theirs. They claim to be the best network provider but now they are just a disgrace. This is in competency at its best. Taking more than 4 months to cancel insurance, such a simple process. One other thing is that their nonsense free airtime when you recharge is just a marketing ****. After they give you the free airtime you can only use half the money and it starts chowing your own airtime and you forfeit the rest of it. I will be one of the few people to sue them not for intentional monetary gain or anything but just for the matter of principle. As soon as this is resolved I will migrate with all my friends, colleagues and relatives and will tell everyone how you rob people and not to do business with you.