Vodacom is a ****

My contract ended in November,they put me on a month to month,which I cancelled multiple times since December until February however the debit keeps coming back,I didn't pay it last month,now I just received ridiculous charges on my invoice.I logged a dispute and I haven't received any feedback.all of sudden Vodacom blocked my number at their call centre due to high number of calls I make to them.they have messed up my credit profile.