Falsely accused of account being in arrears

I phoned RCS on Saturday after getting an SMS stating that my Makro account is in arrears and was assured it is not as Makro gave me a payment holiday in December because my account is up to date, now I get another email saying my account is in arrears. I make use of e debit order to pay my account, if Makro didn't run the debit order then it's their problem, now I get accused of my account being in arrears when it's not.