Divorce

8 years ago I got second marriage my 2nd wife in Pakistan and im in uk...we had problem from day 1 agter 1 and half year I sent her back to her parents and told her I don't want you and I will send you divorce and I did.. for 3 years I didn't contacted her,,after that somehow she contacted me and I started to think she is changed and now since last year I been very sick and when I went to her she start putting conditions keep me or first wife my first wife found out im with second we had lots of problems sturmy first wife asking for divorce,, I told my second wife im going back because I need time to recover from my sickness,, she started pestering me why u don't talk to me and start phoning around and bad mouthing me and send me text better you give me divorce as u not good husband ..I told her soon I will send u divorce now she said u never divorced me and I don't accept I don't want divorcei have not seen her her 9 months and spoken to her from 5 months.. I just want to get over with done please advise me quickest way..sorry im muslim guy