It definitely sounds as though your phone number is receiving Premium Text Messages from 242-422.
You can opt-out of getting these messages in the future by:
Sending a Text message with one of the opt-out keywords below to the Short Code. This will stop future billing for the Premium charges on this short code.
Once you have replied using one of the opt-out words, you should receive a confirmation text message from that company letting you know your cell number has been removed from their program.