Insulation slows heat transfer but does not create or verify a safe temperature by itself. The contents, cooling packs, duration and conditions all matter.
What the observation tells you
A bag previously used to carry shopping is not automatically adequate for a lengthy repair. Raw and ready-to-eat food still need separation, and repeated opening reduces the benefit. The engineer's arrival time is not a reliable limit on how long work might take.
A useful next step
Plan suitable chilled storage in advance and follow official food-safety guidance. Monitor conditions appropriately where needed. If adequate storage cannot be arranged, discuss the practical implications before emptying a food-loaded refrigerator.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.