Rain...... or no Rain increasing bills for no reason

I opted to activate my "free sim" cards. Low and behold I get a bill for n additional R400. I apparently requested a speed upgrade on my sim cards. NO proof, no call replay, 3 emails and 4 calls later . Crickets. It is exhausting to deal with a company whose agents are not capable to respond to anything. Multiple mix ups on deliveries and modem replacements. It is raining crickets