Worst experience ever

I bought a home router online in September. I made multiple calls to MTN and referenced each call on every new call I made just to show I had a trail. I sent emails as well, to which I got responses that my matter would be handled/escalated but to this day I am unable to use my router and another debit will go off tomorrow yet I have not used any of the data on tha package and every time I call I am transfered to a different department or told my sim is activated and RICAd and is ready to be used in 24 hours but nothing ever happens. I have not been to an MTN outlet because of my working hours hence the calls and emails to get assistance. I really thought having this router would somehow lessen my data expenses but instead I spend more and don't get my moneys worth. I even want to cancel the contract.