Agree with this. Also had similar issues with their customer service, who probably thinks that the world owes them a living. Haven't had much problems with the products, but the recommendation is to buy from Harvey Norman or somewhere else where you don't have to deal with Bosch directly.
My hob was spoilt, and was surprised when it was easy to get an engineer to come down. Unfortunately, he didn't have the parts and it would have to be ordered. Unfortunately for me, I didn't get the engineer's phone number. So, all I'm stuck with is the customer service, and all I asked was for them to inform me when the parts will be arriving. After three phone calls later, I am no closer to knowing if such a spare part exists. And to reconfirm, three calls were promised to me, none of which happened which is why I had to call them three times. If you don't want to deal with them, don't buy their products.