Dissatisfied service and product

I bought a bycicle for my gran daughter for Christmas on the 10/12/24 at the cornubia branch .I took it back to have re assembled, customer service did call to let me know when it ready for collection I went a few days later to find out and it was ready.My grand daughter 5yrs old rode it for a day and the tyre went flat,I then took it to the garage to fill air only to find out that the tube has burst, I then phoned makro and spoke to a manager of the department who couldn't help,I asked for the store manager Dolly who put me through to Kamala and she also couldn't help as it was wear and tear. In less than 2weeks she decided it was wear and tear, didn't even consider it to be a quality issue.I had to replace the tube which cost me and all the running around and phone calls.Service is pathetic.Makro should change they advertising.