I can give you an example which works with tag-filtering, but do not know if it is the same case/situation as yours.
In this example you are working with TAG-FILTERING…
https://russian-dima.wixsite.com/meinewebsite/filter-my-phones
And here you can see an example where 2 FILTERS are working in combination (multi-filter).
https://russian-dima.wixsite.com/meinewebsite/blank-3
You can combine both functions.