Vauxhall Meriva Brake Light Switch Problems

No break lights

MIDDLE LIGHT AND BOTH REAR LIGHTS HAVE FAILED TOLD MIDDLE ONE COULD BE EARTHING PROB

I purchased this car 11 months ago with 42,000 on the clock but over the past 6 months have had nothing but problems with the above lights comming back on within 2 weeks after the garage have diagnosed and fixed the problem ! To date I've h...