Interestingly I have just read an article on hormone replacement therapy prescribing written by the doctor you referred to Blueberrygran. The one who took you off HRT.
In it she states “Assuming there are no absolute-contraindications, patient choice should decide whether HRT is taken or not, what type of preparation and for how long.”
In your place I would be writing to her telling her that
My quality of life has been badly affected by your unilateral decision to take me off HRT and I would like to return to the menopause clinic to be reinstated on oestrogen implants in line with your recommendations “Hormone replacement therapy prescribing” in which you say “patient choice should decide whether HRT is taken or not, what type of preparation and for how long.”