If you’ve put a code into your basket, and then changed your mind and didn’t buy anything, sometimes a brand will consider this code ‘used’. This can also happen if the transaction failed to go through, or was cancelled by the retailer.
As annoying as this can be, in most cases, you will be able to generate a new code within an hour which gives you more time to spend browsing online.
However, if you do find this is happening more than once, give us an email at help@studentbeans.com and we’ll have a look into it.