Probably a life time! From whatever DPs reported on the net in various shut down threads, Chase and BofA seem to NEVER FORGET. Citi on the other hand would refresh in about 2.5 to 3 years but Chase and BofA keep their grudge indefinitely, even it is their own faults. Though the system block indeed could be overturned by higher up order in the case of Chase. No recollection about reading BofA success.

During the massive erroneous shut down a few years ago, the Exec Office was the route that many card holders got their positive responses / formal letter of apology when they wrote, detailed the case and asked an explanation on why their accounts were suddenly be shut down. (Some of those people had Chase banking products where the balances often are quite large - a place to put their college tuitions / living costs for the full semester or the year, fwiw).

I would take the route to write because if the situation is as stated, this is a serious programing error by Chase with the customers being adversely affected thru no fault of their own. If not corrected, the customer will have a blackmark in his profile at Chase FOREVER! Personally I would take whatever action needed to get this thing rectified instead of must "move on" as the "easy way out". The consequence of not resolving this could come back to haunt the OP in the future. No question in my mind this would eventually happen, just dont know when it might. By then it would be way way way too late to get anything done due to everything would have been archived and impossible to trace any factual history.