Refund refusal for poor service

I bought the prepaid wifi topup on the 2nd November and I got no service for 7 days straight after the payment. After calling and logging tickets with no success, I request a cancelation and a refund on my payment the 3rd day of having no service and i explicitly told them i won't be needing their services any longer. I got an email from them saying my order has been canceled and they will be processing my refund. On the 11th I get home and the internet service is active, to my confusion I enquire about this but get no response. Now they are lying saying that they called me on the 11gh and I confirmed that I indeed want the service when I don't. They are refusing to give me a refund stating that they're only going to give me a refund for the downtime and not the full refund as I had requested. They have ****ty service and no respect for their customers at all. I regret the day I signed up for their services to begin with.