Angry Delft Vodacom Lte Data consumer

I took out a lte data contract with vodacom a couple off years back ,then service was good. The tower batteries was ****** twice and they move the towers to another location, but. now it affect my home network .After numerous complains revers my debit orders. I wouldn't like to cancel . To communicate with them is not possible. And they cant say when the tower will be fix. Now th at I've withdrawn my debit order can they hold me to contract or how do i solve this problem.