World wont load to realms

I have a world on Bedrock that I made a while back and the first time I added it to my realm it worked with no problem. I eventually switched it out with another world and I bought a 2 player realm for my old world. But it wont load onto the realm. I've tried everything. I've even tried loading older versions of this world onto the realm. I also ended up buying another 2 player realm hoping I could load it onto that one and that didnt work. Now I have 2 2 player realms that my world wont load to and I cant see coordinates when I try to load a new world to it. PLEASE HELP. This has been a waste of my money and I cannot figure this out. How do I get my old world to load onto the 2 player realm???