Disgrace !

I’m being debited for a router contract that I took out with mondo last year August! They gave me an LtE router which is not compatible with area (mind u they checked before) . I jus don’t know what to do now because I have been calling and calling since last year , nothing has changed . Every month I get debited R360 for this router and I’ve never used a single byte. This is frustrating me ! No one seems to help. I’m told matter is being escalated to where I don’t know. All I need is reimbur*****t and cancellation because this router will never work here. I was told that the number was cancelled in Feb but the contract is still debited . What exactly do I need to do to get my hard earned money back from u guys.