Bad Administration Service

I have opened the account in less than 2hours with RCS group at sleep masters to purchase a bed. However, i decide to settle the account after a couple of weeks and i paid up all the outstanding balance at sleepmasters. The lady at the shop told me to phone their credit provider to close the account. RCS group then instructed me to forward all my details to them for processing. On 27 June i forwarded everything via email. I informed RCS to reverse the debit order that went through on the 25 June but then they failed and said it's not appearing as yet. So i forwarded them my bank statement and proof of account settlement on 30 june. When i phone them nothing has been processed and i had to wait on the line for 15minutes everytime i called them. They always kept me on the line to check with admin. I had to go to the bank to reverse the debit order and after that i get an smsn informing me about oustanding payment two weeks after settling the account and when i called still nothing was done and to this day i havent closed the account due to bad admin service from RCS Group.