A couple of months ago i registered and had my first visit to a new dentist. I had a filling in my very back upper left tooth aprox 2 months ago. I had no pain previous to this but was advised there was a cavity. Straight afterwards I was in a lot of pain and returned to the dentist. He advised that he added a bit more seal to the filling. The pain was still there so I returned again and he said the filling may have been too high. He removed the filling and appeared to put in cotton wool mixed Vaseline. He told me this was a different type of filling, informing me that the majority of people suit the other filling I had originally but as i appeared sensitive to that, this new type of filling should suit me better. He also gave me antibiotics. 3 weeks have passed and although this seemed to have fixed the pain temporarily it has now flared up again. I have never heard of a cotton wool filling before and I have my doubts this is a permanent solution. The tooth is also left with very sharp jagged edges I can feel with my tounge.
I was initially told the first time I returned that I may need a root filling or extraction. I find this a bit concerning as I had no problems previously. Could you please advise me on this and whether cotton wool fillings are common practice.

Just something else you maybe able to clarify. On my first visit he also did a 10 min clean polish and scale to my teeth which I was charged £60 for. I thought this was something a hygienist did as my husband who is with another dentist got referred for this treatment and it was about 40 mins with a proper hygienist.

Thanks in advance