The first one I found:
OES - Nauka jazdy - Warszawa
Office:
Długa 44/50 lok. 14 (Metro Ratusz Arsenał)
00-241 Warszawa
phone: 791 792 322
open at thursdays 17.30- 20.00
(or after phone registration)
The prices: warszawa.szkola-oes.pl/oferta
The Basic Course in English (B Category) is 1789 PLN
You may find also something interesting at this thread:
https://polishforums.com/life/driving-test-english-speaking-school-20101/