My name is Piotr, I live in Warsaw and I know what you feel. I’m a learner of English and Spanish too. You can read, you can write, but speaking and understanding is still difficult for you. Poles speak too quickly, sometimes they cut some words.
You need to know that the problems in understanding spoken Polish is very common. Fortunately, there is a method. Start listen to my podcast and consistently implement my advice, and you’ll see how quickly you will improve this skill.