Very bad after sales service experience

A 2 year old Bosch fridge/freezer broke, after multiple calls with Tafelberg and 3 weeks later this is still not fixed. A huge problem is the Bosch service side which is just as bad, incorrectly diagnosed problems and parts ordering which takes way longer than mentioned. I cannot keep following up on this, I bought the more expensive fridge with an extended warranty as indicated by the sales agent to be the best option and this is the service I get, this is not acceptable.