Just an update! I finally got a response from my dentist, after chasing her and leaving a message on her answering machine. She left a message to my answering machine today saying she already sort it out and just ignore the letter that she sent me. Too late! I already terminate my service to her and registered to other dentist as NHS patient and met my new Dentist, she seems nice but we will see. It's hard to tell. Thanks for all the members and moderators who has given advices!