The situation with OP was that he made a written statement that he's currently a resident of London. Regardless of the statement was made just to simplify his situation, and he simply didn't want to overcomplicate an explanation, OP can't simply retract it now and change them due to the self-incriminating nature of it.

Given Rollbit doesn't shut themselves completely and allows OP to prove his situation, several solution that, though all of them seems a long shot, crossed my mind that probably could remedy this and help OP retract the statement are:

One, if OP perhaps have an official instruction letter from his office ordering him to move to London, with effective date written on it. Though I think it's quite unlikely for a company to issue such letter if the transfer happens "internally" [within the same company].

Two, OP can perhaps requested such letter from his HR department or whichever department issue the kind of document, explaining that he's indeed will be a resident of UK in a near future instead of already been them.

Or, three, if OP happen to yet to have UK residence permit prior to this [since he commutes and only stays for very short duration, I think there is a chance he didn't apply to this before], and only have them now or in the near future, the residence permit has its date of issuance on it, it shall prove that during the previous months, OP are not a UK resident