...also here are often costumers which buy products, don´t test them exactly and then say for example, that they want things work on a other way, that things must be changed and modificated.
we sell products like they are in the market and there is often no time to change things and would take much time.
so now they can say that they are not happy with the product and support and just give it back, but the product works like it is on the testsite and in the description?