No connectivity/ no reception in Parkmore, Sandton

I have been an iburst customer since early 2012 and my father since 2014. We have had good connectivity in Parkmore, Sandton, were I reside. Since February 2015, the iburst signal has all of a sudden become so shocking that we are lucky if we get any internet access and 50% signal strength. We used to achieve 98-100% connectivity prior to February 2015. We have made numerous trips to the center in Bryanston and I have called the call center as well. We were told maybe some building could have been erected in our vicinity (this is not the case). We were also informed that a technician can come check the signal. His solution was install an antenna at a cost of nearly R2,000.00!!! I was informed of this antenna at a cost of R550 initially. I have also asked were is the base station that services Parkmore and could they kindly ascertain if there,s a problem there. I feel this is inadequate customer service and we are paying for a service we cannot use at home. How can this be addressed??? I really value being an iburst customer and would prefer this being resolved instead of having to cancel.<br> <br> Rgds,<br> <br> Rishi Albert