I don't know if i've received my prize or not.

Bootsalebargains

I received an email back in november saying I'd won a £50 itunes voucher from playing heart games times tunnel which I assumed was this competition https://forums.moneysavingexpert.com/discussion/2840340
I emailed them my address and they said it would be sent out the next week but heard nothing since.
Then 2 weeks ago i receive a letter from heart games saying congratulations you've won our competition your prize which is £100 itunes voucher will arrive within 28 days.
Voucher has arrived today for £100 but I don't know if these are the same competition and the email made a mistake in the amount or if I've won 2 seperate heart competitons.
I don't know if I should chase up the £50 one