Account being closed because of one missed payment

I called the Vodacom device insurance today to advise them that I closed my cheque account and opened another one however I did not have a chance to call in to update my banking details because of work shifts.I have had a policy with Vodacom for 2 years going on 3,I have never had missed any payments besides the most recent one.The consultant that I spoke to advise that my account has lapsed and that my account can not be reinstated.Im calling 6 days after my debit order date.Yes I acknowledge my mistake and take full accountability however I was advised that there is no grace period and there is no account number that I can use to make payment .Vodacom once stopped debiting my account for two months,I called in and they advised that I called in to change my banking details when I did not do that.The only time I called to change my banking details was in 2023 in June or July and I advised them to provide me with a recording and the date when I had called in 2024 they could not do that as there was no call recording and there were no changes that were done in 2024 by myself.My account was reinstated and everything was fine My question is why is that when a mistake is done by the company they are able to reinstate my account but when it’s done by me I can’t be assisted.Where is the fairness in that?I have not done any claims within the 2 years and I need to accept that my policy cannot be reinstated after making payments for so long I’m not happy about this