cant reopen my realm

Hi, I got a realm a while ago. I am in a mid month subscribtion. i got some shaders, and after some days it buged. So I took the shaders out. what hapened next is not normal. I opened the realm again and the textures buged worst. so I closed the server and remade the world to make a fresh restart. after that I couldnt reopen the realm, it closed, and every time I try to reopen it, it gives an error without any explanation. please help me, I dont want to waste my money.