Wearnes Automotive Singapore review: Volvo S60 T4 reliability & Extremely poor customer service

Our nightmare started since we bought this car in early 2012. We owned a few new cars before, they were all serving us well, I never have to send my car for repair for any original defects for the first three years of driving. However, below is my Volvo S60 T4 records:
1. Feb-12 (Brand new): Bad smell from air-con specially in the morning. Wearnes initially insisted that is due to fresheners I used even I explained that I used fresheners bcoz of the bad smell. After several complaints, they final admitted that is due to the type of filter used.
2. Feb-12 (Brand new): Air-con only blow hot air
3. 7/2/2013 (14, 664km): Belt Latch RR replace as is too high can tear someone dress
4. 21/11/2013(29, 085km): Coolant Return Hose replace due to pipe badly corroded causing coolant leak, causing engine overheat
5. 24/12/2013(29, 997km): Coolant Reservoir repair due to coolant leak, causing engine overheat. When I request Wearnes to let me know what happen, answer given to me "nothing wrong". But the fact is that the problem go away after car left the workshop.
6. In year 2013: Vehicle IU (In Vehicle Unit for reading cash card) faulty
7. 24/1/2014 (30, 886km): Complete gearbox replace due to faulty gearbox, car jerk badly at low speed want ramp up speed slowly.
8. 1/8/2014:12V power supply faulty
9. 3/10/2014 (~39, 000km): Clutch Greasing due to leak causing knocking sound when driving at low speed. 12V power supply faulty
10. 4/10/2014 (~40, 000km): Coolant Reservoir repair (2nd time) due to coolant leak, causing engine overheat. When I request Wearnes to let me to do a thorough check to ensure no 4th time repeat of problem, answer given by staff was "I do not have the crystal ball to know when it will happen again".
11. Oct 2014 (~40, 000km): Loud noise coming from undercarriage of car when drive thru road hump even at about 10-20km/hrWearnes insisted that is due to a damaged plastic cover at the undercarriage. However, noise disappeared after car came out from workshop without replacing the plastic cover, till today, Wearnes still insisted that is due to damaged plastic cover, that I have not replace. Look like they want to cover up the problem, again.