Still weak signal

It is the second time I have to write a complaint about weak signal from Vodacom in my area. I gentleman from Vodacom came to do signal tests and Vodacom was supposed to report back to me to either boost the signal by means on an aerial or there was a possibility that there was a problem in the server. No one reported back to me. This morning I called customer service and they told me that there was no report about a bad signal on their system? I have a Data package with Vodacom and the signal is atrocious, I can't use the connection that I am paying for.