LESS FOR OUR MONEY

Can someone please explain to a layman why we in our business are getting less effective internet service with our contracts and ****les that we have. We are in the Risiville (Vereeniging) area and have been using your network for the last 4 years. For the past 4 months, we battle to receive a consistent internet HPSA signal and instead receive the 3 g signal. i am constantly battling to send and receive mails because of this problem. Is this problem due to more users on the local tower or what? I feel that we are getting less for our money than we use to! What should we do to get a stronger and more effective signal so that we can work more efficiently?