Ecovacs Deebot T20 Omni Robot Vacuum Cleaner with Hot Mop Washing

The vacuum itself used to work great and emptied and mopped perfectly, recently there has been an error message about checking the wheels and one seems to be stuck, I have cleaned both but one just seems to be faulty and the spins in a circle a bit, but for someone who has time and the knowledge this would be great for them and a good deal as I imagine it’s just a wheel replacement but then again I don’t know much about fixing them. There are a few marks on the hoover but no deep scratches or anything (shown in pictures), feel free to ask questions or make offers

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