I had the same situation (lost coins, players, and found some players on the quick sell section). Contacted EA help, (on 18 March) and they said that in several days i will get my stuff back (will receive an email from them with further instructions).

Yesterday (on 20 March) i received an ingame message saying that my stuff is in packs. (i don't know for sure if i received packs -> i was saving packs and don't know the numbers/types of each pack). The ideea was that nothing from the missing stuff was there (not players, not coins, and the players from quick sell section were still there)

I don't know what to do next, i also messaged EA Help on Twitter but received no answer yet.

Most likely i will wait till Monday/Thursday and resume my case from ea.help (that ingame message confused me alot)