RSC FAILURE TO CLOSE ACCOUNT

On the 12 march 2019 I requested a settlement letter, on 16 March 2019 I then respond with a prove of payment and then I tried making follow up to find out if the account was closed, however I didnt win becouse I will wait for hours on the phone just to talk to someone. Then I received this month stetament clearly pointing out that the account is still open. Then on 17 April 2019 I have send out an email pointing out the problem. Until to date, RCS hasn't managed to come back to me or close the account