Vodacom not willing to assist long term client

I live in an area where our cellular network is very bad. I run my office from home and struggle continuously with the inconsistency of the Vodacom cellular network. I have spoken with the clients services, and although the operator was polite and attempted to be as helpful as she could, Vodacom themselves are not willing to assist me. I am a long term customer, having used the Vodacom service for around 10 years spending an average of about R4000.00 a month with them with all my contracts. I have requested a cellular reception booster be installed at my residence so that I may conduct my business successfully. Their response was ''a new tower is in the planning stages of been erected in the area some time next year'' No date can be confirmed! so I should just deal with next to zero reception for the next 18 months or so!! all I require is a booster to improve my reception so that I can continue using their service! is it that much to ask? my intention is to port all my telephone lines and data lines to an alternative network that may be a little bit more concerned by the lack of service received by their clients.