Bad service and network for Vodacom

Good evening I find vodacom’s service poor because we have bad network at unit 123 Epsom Terrace, Bryanston, Epsom Downs. My Dad and I have continuously tried to call and visited Vodacom shop at Nicolway shopping centre for the last 3 months and nothing has been done to rectify our bad network in our complex. We would like immediate attention and this problem solved as it is very frustration. We would like to continue supporting vodacom, but this needs to be sorted out.