Do we need to put up banners to get a response

I was told there my complaint is valid - signal is a problem in Radiokop area. No alternatives offered. My cellphone bill almost doubled as a result of this. I need to be on 4G to receive Edge coverage if I'm extremely lucky. Is it not breach of contract if you can't deliver a service I'm paying for. Great to know you response to certain queries, like provinding a signal booster to some customers, but I will probably have to pay for banners first to get your attention. Unacceptable Vodacom!! I will port my number when my contract is up for renewal.