Pathetic Service

I called the retentions about 6-8 times on Friday (25 Nov), whilst speaking to the consultants the calls dropped or cut. Only 1 person had the decency to call back. I called today (29 Nov) to do a follow up on my upgrade, i did noy understand what the person was saying, and then she cut the call and never call back. I am a loyal MTN customer for more than 20 years, its pathetic how they now treat us customers, Can someone senior from MTN help me??