Samsung Germany refuses to honor cashback

I've purchased a Galaxy Watch 5 to give Samsung a try. The main incentive was 75 euros back, making the purchase a great deal. Well, it didn't go as planned as Samsung rejected the cashback playing it on a technicality. Two times in a row, the cashback form was not accepted, quoting AGB (Standard Business conditions) and claiming that I'd used the wrong product code withing providing more information about it.