General ACCAWhat are my prospects after completing my very final acca exam?

Hi, I am a 26 year old female, graduated from University of Birmingham in 2015 and since then I had been working at a small accountancy practice from October 2015. As at September 2018, I have almost reached my PER of 3 years. I am feeling very discouraged about my position at the moment. I had started off working as a junior, 3 years later I am still working as a junior and my salary has barely increased, it is still under £15K. I did have exposure to preparing various financial accounts and software packages such as Xero, Sage, SAPA & CCH. I was unexpectedly moved into payroll for more than 1 year back in 2016 which I was disappointed about as I wanted to develop myself in audit and accounts. As a result I haven’t even had the opportunity to do any client facing roles nor have I been out on audit. I had just returned back into audt & accounts in March 2018 and I am hoping they allow me to go out on audits this year, so far they haven’t. The firm I work for are old fashioned and they are not that supportive with my progression. in terms of my ACCA progression, I now have 1 more exam left before I qualify. I believe that I have ticked most boxes of objectives for practical experience, however I still lack audit experience out at client sites which I am disappointed with. I do want to leave my current firm and I intend to do so after I completed my final exam in December 2018. What are my prospects in terms of position and salary after I pass my final exam and considering the experience & academics i currently have?