Mozilla does not run surveys that ask for personal information, nor that offer to pay out rewards of any kind. This is a very common scam and I advise you to contact your financial institution for help ASAP.

Doppy said

Got a survey I thought was from Mozzilla choice of a free gift just pay postage, few weeks later £69.99 taken from account. Please be careful question has been answered Mozzilla don’t do surveys like that.

Yes that was done soon as I found out, they can't take any more.