Purchase a motherboard and a Core I-5 at the same ...

Purchase a motherboard and a Core I-5 at the same time. At the time of ordering I asked them to verify the components were compatible. When I collected the items they again confirmed they were compatible. After assembling I find that the motherboard on-board video cannot work as the Core I-5 was an 'F' version (no integrated graphics). Emailed sales about this only be to told 'Everyone knows an 'F' version doesn't include graphics'. He them went to indicate it was my fault for not asking the correct question.
I used to be a customer. No more.