Lost my BTC when deleted/reistalled the mobile app

[SLVR1984]

Hello!I would really appreciate some expert advice from any of you concerning my problem with lost BTC.I apologyse for my simple explanation about the whole situation as my knowledge of the IT language and know how is almost non existent.I'd call it basic knowledge but probably not even that.In short,i am able to buy and exchange,send/receive and that's about it.But long story short-i had about 1000(got down to 700 but it was back in April so now it should be worth a bit more)usd worth of BTC on my mobile app.I had funds in Okex and transfered them to the mobile app in multiple transactions without being in sync with the desktop version(thinking back,that was a mistake to get them to ledger without beiing in sync with the desktop.But u can receive coins without validating with my Ledger Nano S.Everything was fine but i tried all kinds of ways to connect my device with desktop and also mobile app and never saw the amount of actual BTC on the desktop app,said it was all in sync but desktop showed a balance of O.And one day i got frustrated because i needed some money and wanted to transact some out of my mobile wallet,can't do that without validating with Nano S,angers me that i can easly put money in but transfering out is not possible.So i saw in settings that ur funds wont dissapear whatever u do:Reistall the app and so on,the funds are on the chain.So i deleted my mobile app and reinstalled.Balance-0.Also,would be easy to prove if i took even one photo of the funds on mobile but i took none,because i've read that Ledger is one of the best and i was under the impression that i would still have those funds in my wallet.Fortunately what i do have at home on my desktop is a whole folder full of allkinds of files which came from saving history etc.All the people here would know where and what to look for by reading the code but i'm clueless.And also,is it possible that when i deleted then the coins went down the drain or are they still somewhere?And also,could someone please tell me what should i do next or should i forget about those coins once and for all.Contacting support again is pointless because i don't know how i would get all this data they wanted to see obviously.Thank you if u were able to make some sense of this story and i'm open to all suggestions✌️