Terrible Service and processes

Had the worst experience when I signed up for home LTE. From the first day it wasn't working, when I called the coverage department they said that a technician will come to me to install a bosster. For more than a week nobody contacted me. When I called they said I should just wait for him because they don't have a SLA. I eventually went to the shop to cancel on the 9th day. At first they said that the manager is not in so they'll process the cancelation and I must come back when the supervisor is there for a refund. I went 2 other times on separate days to the store in Mall of Africa and surprisingly the supervisor is always not there. Whenever I call the call center they transfer me to different departments who end up not assisting and dropping the calls. Is there anyone in your company that can assist me with a refund?