Telkom NO ASSISTANCE in breach of contract!!!!

last year Dec, we took a special that Telkom launched on a wifi/data package of 40g day and 40g night time data. so the first 3 months in the middel of the months we ran out of data (note that the data was only used for email) when we enquired proof of the amount of data we received the month-they sent somesort of data sheet that no one knows what the hell is going on on that thing! and telephonically state that our package is only 20g day and 20g night. we fight against it and are told that they will get back to us (NO ONE EVER DID)! then suddenly the following month we had data for the whole month! another 3 months went by without any data shortage or problems then suddenly the same problem occurs -no data! yet again I phone and email Telkom to sent me proof of the amount of data we are given every month and still no one has phoned or emailed us back???!!! now listen here: we chose Telkom because they are very competitive with their data prices but the service is ********! I would like to get a proper followup report on this and proof!! for the months were we did not received the full 40g I request a refund immediately!! and because of this none stop up and down worst service I would like to get the info ASAP and to cancel this contract because Telkom is in breach of the contract and did not stay in the term and conditions! after numerous phone calls I have to result to Hello Peter to get this resolved? with the mono cell phone contract- was NOT adviced prerior to the purchase that the phone call minutes of 3000 ONLY counts for Telkom to Telkom landline numbers! I got this contract for work but the contract is useless because I still have to buy airtime! and only use the phone for whatsup!! I need to also find out how to cancel this contract? ??