Wedding registry didn't give 10% back on giftcard

From the beginning, @Home's registry services seemed disorganised compared to other services we utilised. <br> <br> First of all, @Home gave us no notice of when gifts bought online form the registry were going to be delivered. Therefore we were just left guessing when the gifts were going to be delivered. <br> <br> Secondly, one of the main reasons we chose @Home as a registry option, was that we would receive 10% of the value bought through the registry back on a giftcard. The total value of the gifts bought through the registry (online and in-store) was R 3560, but when we requested the 10% on a gift voucher, we were only given R88 - which is obviously much less than we should have received. The employees in-store do not seem to fully understand the registry, therefore they could not explain why we did not receive the correct amount. Also, we exchanged two gifts as one was received broken and the other was available in-store in a better colour. These two items (worth R1348 together) were subsequently removed as 'purchased' on the registry and don't qualify for the 10% back. The amount due to us is quite substantial (upwards of R300). I would appreciate your assistance in resolving this matter.