Selvnivellerende avrettingsmasse

Selvnivellerende avrettingsmasse. i am looking for a company that will cheaply : make me a self-leveling screed in the basement. 2x rooms, corridor, bathroom. Room 1 --- 16. 7m2 * 55mm Room 2 ---- 11. 1m2 * 55mm bathroom 7m2 * 40mm There is xps styrofoam on the floor + 0. 2mm foil + reinforcement + cables for underfloor heating. Everything is prepared (expansion strip), all that´s left is to put pour concrete