********* and poor customer service from DSTV

I have been a premium subscriber of DSTV for almost 15 years. I redeemed a voucher on the app however the code did not work and I brought this to the attention of DSTV immediately and within the time frame. It's a month later and DSTV has still not resolved the issue and provided my replacement voucher even though I have sent over 20 emails. DSTV customer service is extremely poor and ********* as one of the agents attempted to trick me into thinking the issue was resolved.