Q & M Dental Group review: Tooth filling

I have a Gum ache and try to book appt since not many Tampines Q&M has available slot. Suddenly the clinic called me on 8 Aug 26 and told me 1245 or 445pm which i have chosen 445pm. Went there and told the dentist Sathyendran Sivarajah, I have shown him the Xray i did on 2 Apr from another clinic and he wanted Xray to check if the filling did properly. He told me the radiation is very mild yet they run out of the room like scared. After X ray, mentioned that the decay which cause food stuck and infection to the Gum. i told him that my dentist unable to do it, he mentioned that they do not have the skillset. So i trusted him, asked what is the process that he will do to my tooth. He said leave it to him. I feel kind of SUS but still proceed with it as there is no dental opening for PH. He did injection of anesthesia because i afraid of pain, and did the filling with the whole process. he mentioned he did the floss and told me that floss the next day instead. when i tried to closed my mouth to have a normal bite, i feel that the filling tooth is higher than my natural bite. I have asked him, he said that is a layer to protect the filling, it will go away once bites more. I tried to floss a few times on 9 Aug 26 night, the floss unable to enter and i have been feeling very rough on the tooth. I am unable to bite any food on my right side due to the filling. I have asked around and many mentioned that there is no uneven filling. The dentist did not bother to polish it. I have read somewhere that the dentist did not do a good job for others.