Dstv price lock

Hi...I was on dstv price lock. I received a call to let me know that my price lock plan was coming to an end...that was April stating it will expire at d end of may..i was offered a new price lock plan for R749 which I agreed on. I have been receiving text msgs during may to SMS save to 41420 if i want to renew my plan for R749 a month.i have messaged every time and I have not received any call back...I called dstv on numerous occasions and they say the price lock department does not take calls so they will escalate my issue with them but it's now June and I still have not received a call. My subscription will go up at the end of this month due to dstv poor customer care service. Does it take almost 2 month to call a customer back.