astroboy blu-ray and 30secs from mars

got these 2 items 2day at hmv. ultilized my $5 coupon i got for signing my purchase with a rbs card. 2day i got another again. isabelle [who was with me while i met her for coffee] checked with them on what criteria do i get the coupon, the reply was as long as i use rbs card, no min purchase. i could have simply split payment for my items and get $5 off each of it .... fedup