Canon Pixma MG8200 - not working (Northfields W5)

This printer has error code 5800 or 5B00 which means that the ink pad is full and needs to be cleaned. Tried to do it myself but did not succeed. If somebody knows what they are doing, it should be easy. I also have ink to go with it.

Fair Chance Policy: I’ll wait before choosing a recipient to give more people a chance to reply.
Collection Times
Flexible - late afternoon generally best