Perindopril for BP is now giving me foot and leg swelling

I was put on Coversil 4 (perindopril) 10 years ago when my BP was going up to 180 - 190. That kept my BP at around 140 although The dosage needed to be increased periodically to keep achieving this BP.

When the dosage was eventually increased to 10 mg, I started getting constant foot and leg swelling and BP that tended to often be up to 190 by mid 2024.

A GP added a sulfa diuretic in mid 2023 but I had side effects as I am allergic to drugs with sulfa. A new GP again tried to add a sulfa diuretic early in 2025 and I ended up not taking it and my BP climbed to 170 - 190 and my feet and legs remained very swollen with pitting oedema . Then, in mid 2025, this same GP put me on a combined tablet (Coveram) of 10 mg of perindopril plus 5 mg of amlodipine. Subsequently my feet and legs remain very swollen and my BP now varies from the low to high 100s.

This GP now wants to prescribe the sulfa diuretic again.

I have three main questions:
1. How do I stop doctors ignoring my allergies (mainly NSAIDS) and sulfa) despite my notifying them of this?
2. Why do doctors keep wanting to add a diuretic and not just take me off medications with perindopril?
3. Why am I being made to continue to have high BP and oedema (and now this unusual variable BP)?

Fortunately my heart is fine. I have had a couple of echo scans and no problems were found.