If you are receiving unsolicited texts from the  number 65333 reply: STOP 

The telephone number 65333 relates to a premium rate text scam, reported on the 7th October 2020. The victim had received two premium rate texts from a text subscription service that he had not joined. 

The 65333 texts relate to offers on short breaks provided by a company called valuestay. They also provide a contact email help@valuestay.mobi

In a recent complaint to O2 on Twitter, they were most unhelpful. In fact O2 did not discuss providing a refund themselves for this fault. Instead they suggested that their own O2 customer should contact the company who sent the expensive texts from 64333. The number they provided to do this was 03333137900.