Bad Service from Telkom mobile

I took a cellphone contract with Telkom which was renewed this year in March for an upgrade. Acc no is *** for cellphone no *** R 279.00 (FreeMe 1GB TopUp Deal).With this contract ever since I have it, I was able to call any network number with my monthy voice minutes. To my surprise since from last month I can no longer call other numbers if it's a telkom number. I don't know why was it changed because that is not what I've signed up for.I need them to provide me with all my voice minutes backdated to the month June & July, if not they must terminate this contract and take their device also refund me the money I've paid in advance.I'd rather go to other service provider that will give me the benefits I am paying for.I think this is very ridiculous to give minutes that limit me for whom I can contact. Very few people on my contacts are using Telkom mobile as the network connection is also bad.I cannot pay for a contract and still buy airtime to call other networks. Can this be rectified as soon as possible if not like I said the contract must be voided. I want to be able to contact any network number please!!!!