If you are not happy with your dentures, and have paid for them, then an ethical dentist will re-do them until you are happy. If the dentures are so ill fitting that you cannot chew, they fall out, or you have so much pain that you have to remove them during the day, then they definitely need to be redone. The appearance is not so clear. Did you have an overbite before? Some women want an overbite in dentures to fill out the wrinkles in their lips. Did you discuss this with the dentist?
My recommendation is that you get a second opinion, especially from board certified prosthodontist (a specialist in dentures). You can find one in the phone book or by calling your state dental board or your local dental society. You can find these contacts in the phone book, by calling an information operator or online. This specialist can tell you if your dentures are properly made or not. There may be no charge or a consultation fee. Ask in advance when you make an appointment how much you will be charged for an opinion.
If the dentures are faulty and you have paid for them, the dentist who origiinally make them should be allowed to try to remake them. If not, then you should request a refund of your money and have them remade by another dentist. (Preferably by a specialist). If the dentist refused to remake the dentures or refund your money, contact your state dental board and make a complaint. They will mediate the case between you and your dentist and help you get teeth that you like and that fit you well.
I hope this helps.