Student Discount removed, new code "Already used"

[SThistles]

I recently recieved a text and email stating my student discount has been removed, it went through as an order for some reason. 

I went back on to Unidays to re-apply and it says my code has already been used.

Anyone know if and why they revoke it?

[madasaf1sh]

@SThistles 

You need to speak to Unidays and ask them to create a new code for you, but you might not be able to reapply it. 

The only people who can tell you are customer services, which this isnt, Guide: How to find help & contact O2