Need to cancel my contract as i am not willing to pay any further for no service

<p>i would just like everyone to know that Telkom will not assist in any way if your service is down, i have logged countless queries with them since the 4th of May 2017, It is now a whole month later and i still have no internet and still no service from Telkom, PLEASE can someone from Telkom send me a document VIA email so that i can cancel my contract, Telkom is in breach of contract and i am forced to leave them now, i have made my last payment the 30th of May 2017 and will not pay any further and i will never support Telkom in the future, they are quick to remind you to pay a week before the payment date, but 5 weeks later they don’t help you even after payment, this is *****ing.</p>