Paying for a service I don't get?

I have taken up the router/WIFI – ZTE data package since May 17* - I have enjoyed this till recently – since last week I cannot connect to my router/WIFI – ZTE – I have sent online message s- nothing – been to the Cell C store to sort out – they couldn’t assist me – referred me to the customer care line – and I called them today – they can’t assist me and referred me back to the store – I had to buy myself a 1G data as I cannot connect – why am I paying for something that’s not benefiting and will you guys be paying my R160 back for buying the data? I need this sorted out today still please?

If you guys cannot sort this out – I will go back to the Cell C store to return your router/WIFI – ZTE and t cancel my contract as you not honouring your part – I am paying for a service - which faulty?