Useless Signal

I have been with Vodacom for many years and have numerous contracts with them.I live in Evander Mpumalanga and always had a strong vodacom signal.The last two years has been a nightmare as the Vodacom signal strenght has become pathetic.It has become so bad that my Head Office changed to MTN on my work tablet and the MTN signal is great.Unfortunately I have other Vodacom contracts which is almost useless due to the bad Vodacom signal.We have a WhatsApp group in Evander and All the group members are complaining about the useless Vodacom signal.And to think that Vodacom were the best,now they are the worst. If Vodacom does not fix this problem I will change to other networks as soon as my other Vodacom contracts expires.