Bought a Sony DSC RX10 III online at Coolblue. Aft...

Bought a Sony DSC RX10 III online at Coolblue. After receiving the product immediately registered for the 100 cashback. Shortly afterwards I received a neat confirmation that everything was correct. After two months still not receive 100, so call Sony.
The operator indicates that the cashback is in the system but has been rejected because the serial number was photographed incorrectly. Of this I would have received an email that may have ended up in the spam box. This was my problem because they did send the mail according to their system.
Too bad, no courtesy or any service because the action is over.