Tablet (blackweb)

good day, I bought a black web tablet at Dion wired on the 25th November 2017 with my RCS account. the debited my account and overcharged me extra 200 fortunately I noticed before leaving the mall. (Bedford view) they refunded me 200 . I never used the tablet as I bought it as a gift for my daughter. I then gave it to her on the 15th of January 2018, the devise didn't charge. I contacted Dion wired the following day and I was advised to bring it back. I went there on Saturday in January still I was told they will book it for repairs. I couldn't understand because I wanted a new devise but I was told its the law and that I will receive the sms within 21 working days. I got an sms within 10 days to come and collect and I did on the 18/02/2018, the lady who I spoke to (Lindiwe ) said if I encounter problems I should returning back to the shop, its up to me if I need a refund or another devise. I charged the tablet on the 19/02/2018 still it didn't charge I therefore contacted Lindiwe and she told me to bring it back. on 20/02/18 I tried again to charge the tablet and still I didn't charge. I called Dion wired Bedford view to speak to Lindiwe but I was told she is off sick then the receptionist transferred my call to cash office where I spoke to a rude Admin manager (Sello) who told me he doesn't have time for me and hanged up on my ear. I fail to understand we paying with our money so that Sello can get paid but he doesn't care hence he is giving customers bad attitude. all I want from Dion wired is to replace the tablet or refund me