The number 88802 is a premium rate text marketing service. It was reported on the 16th of October 2020 for sending unsolicited texts to a UK citizen. The citizen herself had not opted into this service. Unfortunately this is a premium text service and there is a charge to reply.
However, you can stop texts from this company by replying: STOP or STOP ALL. At this stage it is not clear how people are being signed up for this service, but it may be that companies are selling mobile phone numbers to these marketing companies for profit.