Recommended dentist in Doha

I'm really bad choosing some dental center here in Doha. I got my braces in a dental center recommended by a friend of mine, although the center was cheap but the service was horrible. You need to wait like hours and hours to get your turn and once you get your turn, it took only 15 mins to replace the bracket and rubber. They won't clean your teeth, check or something, they will just change it and boom ur done! So I decided to transfer to a 'better' clinic recommended also from few of my friends and dang, I did the same mistake from my previous. But this time the clinic charged me 8,000QR for a continuous service from my previous center but the clinic did same as the previous clinic that I've been through, no cleaning, you have to wait for an hour even though you have an appointment for that day and your paying too much. It seems that all dentist that I've been through doesn't know the meaning of 'hygienic'. Just the wire and the rubber and that's it you are done! I have decided to took off my braces when I went back home and it cause me only 300QR and my latter clinic was supposed to charge me a 1000QR for removing my braces off.
Now I am planning to whiten my teeth and ask for implants but I don't trust my instinct anymore as I am not good in judging dental clinics.
Can anyone of you advise me which clinic is the best! Dental clinic that I can trust the life of my teeth. Queen Dental is a NO NO please! Clinic also near Sofitel hotel is a NO also..appreciate your advise guys!