The goal of this clinical trial is to find out whether non-ablative radiofrequency (RF) applied together with pelvic-floor muscle exercises can ease vaginal dryness and other symptoms of genitourinary syndrome of menopause (GSM) in women aged 18-75 years who have survived breast cancer and currently experience those symptoms. The main questions it aims to answer are: Does the combination of RF + exercise lower the 0-to-10 vaginal-dryness score more than sham (inactive) RF + exercise at 6 weeks (end of treatment) and 3 months? What other changes (pain during intercourse, Vaginal Health Index, urinary and sexual function, pelvic-floor strength, overall satisfaction) are seen in each group? Researchers will compare six sessions of active RF with six sessions of sham (inactive) RF to see whether the active treatment works better. Participants will: Visit the hospital once a week for 6 weeks. Each visit includes about 20 minutes of intra-/extra-vaginal RF (or sham) and 20 minutes of guided pelvic-floor training whose content is adapted and progressed throughout the study. Carry out a structured, progressive home-exercise programme, recording any discomfort in a diary. Complete questionnaires and tests at baseline, after session 6, and 3 months later.