The telephone number +447521 244877 is being used by scammers to send Apple Pay Scam texts to unsuspecting UK citizens. if you get a text from the number +447521244877 then you need to ensure that you do not click on any of the links included in the message.
Messages from this number appear to often have a link to a scam website called Applepay-wallet-secure. This is a scam website set up to seperate you from your hard earned cash.