Customer Abuse and Overcharging

If this isn’t a case of consumer abuse and overcharging I don’t know what is. I signed up with Vox on a special that included installation to the value of R2700 with a 12 month claw back clause, which also includes router. Then they mistakenly cancelled my services and charged me the claw amount. I then asked them to reinstate my services because there was an error with them cancelling. Mind you, the R2700 includes a router. My services were then reinstated but they didn’t credit the R2700 which they had charged me but credited me but credit R1700 which meant from their claw back clause they had already charged me R1000. They sent a router over when they reinstated my services which I didn’t need because I had already a router they had previously supp**** me and asked them to collect it. Same system error happened two months later and they charged me another R2700, I asked them to fix the issue and instead of doing that they have R2420 for the two routers in my possession on top of the recent R2700 which on its own includes the router and therefore if they needed to finally cancel my services the R2700 would include the router. But now they have done it again, charging me R6120 for the same installation, charging it twice but it was only done once. Somebody please help.