I know this doesn’t solve your year of lost returns, but you need to disable your automated settings. Once every few weeks, you will need to make a manual removal order for your returns. This will allow you to know where you are sending things, (and more importantly) when you should expect to receive them.
Only you can figure that out. Check with your apartment office to see what happens to boxes delivered to your address, or if they just leave a delivery notice and you have to pick it up somewhere. If there is real money involved, find a nearby UPS store, rent a box, and send everything there.