Sumitomo tyres are a **** and a danger to people

I had Sumitomo tyres fitted on my car on the 28th of July 2023 (255/40/R18) at Minty and on the 22nd of December while driving on a wet road, the car started to loose control. When I got home I inspected my rear tyres only to find that they're finished. When I approached the dealership where they were fitted, they advised me that they'll contact Dunlop to check the tyres. Nothing happened until the 3rd of Jan where I personally drove to Dunlop fittment centre in Jetpark to have the tyres checked and complain about this short period their tyres have lasted as I've only driven about 11 000 kms. The Customer Service Consultant put the vehicle on their alignment machine and said the rear wheel were running on a 'Negative Camber' which is something common on Mercedes-Benz. However, the tyre should not be finished with such low mileage. Also if the issue was because of alignment then the tyres should have had an irregular wearing pattern and not both rear be worn out the same way. He informed me that he will try and escalate the matter and today I was told that there's nothing they can do about it issue. This is appauling as they they advertise that their tyres have a 1 year warranty but when one has issues then all of a sudden such warrnaty doesn't apply to this incident. My previous tyres were Dunlop Sport Max which lasted me about 2 years and got over 30 000 milage on them with no issues. I also spoke to a gentlement based in costal region, who instead told me that it could be that the worng tyre was used for a wrong application, hence it didn't last and my question is why do they develop the tyre if it's not meant to be used on this sorts of vehicles and what is it's purpose. SUMITOMO is a ****ing people with their advert and promise.