Terrible service from MTN

I’m beyond furious at this point. I took a home router with you guys in February. In March you charged me twice. I asked for a refund and you gave me a run around. April I asked you to cancel this whole service but because of your incompetence staff both callcenter and store people have no idea what’s happening. I eventually sent it to the store and they still didn’t cancel and I keep getting charged. I’m so mad, the call centre agent disconnect the calls they don’t know how to handle this and the store tells me to cancel it through the callcenter. Can yal just cancel this thing and stop debiting me!!!! I really wouldn’t suggest anyone to be taking services with you guys with the kind of staff you have. I have called more than 10 times and no has any resolutions.