I want my refund!!!!

Fast delivery. But their customer service regarding returns and refunds and cancellations suck, to say the least. I have ordered the device and the day after receiving it, i contacted them to return the device and sim, unused. They collected the device and promised to have my money refunded. It has been two and a half weeks since they collected and my profile still shows that my account will be debited on 1 July with the subscription and i have also not received my refund or any communication from them regarding my refund. No responses to my mails and when i phoned on Monday, i was promised to be contacted by someone to assist me... it is Wednesday - still no email and no phone call.