Poor Service and bad of customer care

I had my gear Box fixed by triangle transmission and I received poor service. The car spent 4 months in their worshop. I had to make several calls, emails and send my drive to wirkshop every week. I was dealing with Mark who was helpful but didn't stick to his deadlines.

Finally, the gearbox was fixed but after 3 months it had the same problem. I had to take the car back to the workshop as it is was still under repair warranty. The car has been in the workshop for 2 months already and they always tell us to come back next week. I am not sure whether I am going to wait for another 4 months or even longer this time.

This is poor service and frustrating to customers.