RCS Refuses to close paidup accounts

I have settled the outstanding amounts on the above accounts on 10/11/2017 and since then I'm battling to get the accounts closed. I have phoned the call center on 12/11/2017 and was then told that the accounts take 36 days to close? On 16/12/2017, I spoke to "Frederick" in the Call Center regarding this and he told me that he will e-mail the "Closure Dept." to ask for closure (again?). RCS, get your house in order!!!. I need this accounts to be closed with immediate effect and written confirmation there off as this is effecting my "credit score" at the various ITC's!!!