Suspended lines with no reason

I have 4 contracts with 8ta, of the 4 lines 3 of them is susspended on the one of their systems even though all the lines ar working. i have been trying to do a sim swap on one of the suspended lines (with no reason for the line to be susspended)for the last 2 weeks, but they cannot help me because on the one system it shows suspended. i have phoned multiple times and visited the telkom store and all they keep on saying is that they will escalate the matter to the back office but nothing has happened for the last 2 weeks. (will they credit the lines that is suspended since i cannot do a sim swap and use the lines??) At what point can i cancell the contract due to lack of use of the product since they cannot give me access to use the lines??