Do not understan

I have a dispute against a creditor for a paid up account with Transunion. They explained to me that they need to wait at least 20 days for dispute to be closed. The dispute has been logged on 3 October 2022 and is only in progress day 11, I do not know how that works. I have called the creditor that the dispute was lodged against and they confirmed that they have sent all the correspondence to Transunion. I called Transunion and they said that they have not received anything as yet and that they cannot do anything as the creditor has 20 days to respond. Does this mean that these matters not get followed up or does it just get left until no reply?