Bird Seed Debris and better quality food

Hi we have a problem with seed debris under and around our bird feeder and it attracts rats which isnt ideal 

I already use the trays you can hook on which work to an extent but need a better solution

Does anyone have any suggestions or ideas? 

I also no seed quality is a factor in this and for first couple of years I was buying high quality no mess stuff but then extra expenses came up so couldn't afford it any more so at the moment just using cheaper stuff

So any recommendations for decent seed mix that's not super pricey would also be appreciated 

Thanks in advance