NO CUSTOMER SERVICE AT ALL

We have been customers since 2013 and it is always a mission to get service whether you go into the branch hoping to be assisted or phoning they customer services department. I have a billing query where I was charged normal rates for the month of November because my contract expired, firstly no one advised us before that we have to fill out cancellation forms if it is the end of your 24 month contract. Early November we received a notification to say that we will receive an invoice that is going to be higher than the norm and an agent will phone us no one never phoned us so on the 17th December went to the store hoping to sort it out and get an upgrade as well. I phoned customer service twice to find out where my money were that they had to refund as the debit order went off already all the can say is sometime in January. Why did they sent a notification promising that they will sort it out, but they first had to take my hard earned money and now it is my \baby"to keep phoning and follow up. We upgraded but there is still no devices in stock"