No Spark at Sparklight Gearboxes

Shocking service from these guys who claim to be the best and have the only and best equipment of its type in South Africa. My car was sent in for a shudder when changing gears, they replaced something totally unrelated and claimed the car was ready only to find it was exactly the same. It went back again,1 week later it returned with......exactly the same issue. No updates were given and was assured the car was tested properly, today nearly 1 month later i sit with the same problem just 12k poorer, shocking service and daylight robbery!!!