I made a cash purchase at a liberty x store for BTC on 6/19/2018. My electrum wallet gave me a receiving address which I used for the transaction. When I returned home I found that my wallet had changed the receiving address it originally gave me. The transaction shows that it went through, but the BTC is not in my wallet and the wallet shows a transaction labeled as unknown. My electrum wallet has said synchronizing since the transaction. I scrolled through my list of receiving addresses in my electrum wallet but can not find the address it originally gave me for this transaction. I spoke with liberty x support and they verified the transaction went through to the original receiving address and that the BTC are there. How do I get Theses BTC into my electrum wallet. HELP!
It's been a while since the last time I used an Electrum Wallet, but if I remember it correctly, Electrum is always changing addresses for security, but you can consult (or must) all your used addresses by typing crtl+A or simply following the Wallet>Adresses in the main menu of the Electrum wallet.
If it does not appear, maybe you can ask Liberty for the address they send the BTC to you and import it into your wallet, for all the generated addresses are under your private key (they belong to you and only you).
Notice I haven't use electrum for a long time, but I had once a similar problem and this is how I solved it.