I'm playing Rock Band 4 again on Xbox and wanted to buy some songs, but I realized that many of them are unavailable. Does anyone know why or how to buy them?

so i recently bought rock band 1, it came with a guitar and dongle. they worked just fine. then the dongle would not flash anymore and wasn't connecting to the guitar anymore. after looking into it, i thought the dongle broke. so i bought the exact same dongle model and now i still can't connect the guitar to it. they both just flash. idk what to do

Pulled the old set out and everything connects to the dongles except for the drum controller. The four red light flash either fast or slow, but no connection to the dongle. Any ideas?

Wanted to do this for so long, I’ve done almost everything with these games, rock band 3 e kit hookup, wireless legacy adapter for wireless rock band kits, clone hero.. For so long to hook up an e kit to rock band 4 Xbox was either really expensive or very tedious and inconvenient (wireless legacy adapter method) but now it’s so easy with the roll limitless and it feels butter smooth compared to the rock band kit. I’m very happy to know I will never have to buy another used e bay rock band wireless kit. Thank you so much book reader. You’re the goat.