I worked in a hotel where every room had cheap electronic keypad safes . The number 1 issue was handbag straps sticking in the door or the little internal carpet getting caught in the door on closing . Always took me 2 minutes with master code ( not 6x 0 ) and a good tug ..

what do you need to do to service and C&B lock

Ime curious how much you charge to open one of thoes cheep sentery safes. They are around 200$. Would it be better to pry it open with a crowbar and buy a new one