Help (cayo perico heist)

Hello there , a new player i was happy to get the game and the submarine until i failed the preps especially the disturbtion failed them all and now the heist is hard asf , I can't cancel it tried calling pavel its says i need to complete the mission first , i tried joining a friend heist and succeeded with it but still can't cancel mine

Any help on what to do now?

I have it on PC/Steam