I'm having a problem with a Nano S and I hope someone can provide some help.

I purchased the Nano S a few years back and the recovery phrase was stored at a place where I couldn't easily get to it.

In August I noticed the Nano S firmware needed an upgrade so rather than risk any problems I transferred the full balance (all BTC native segwit) to Coinbase. Then I reset the Nano S by incorrectly entering the PIN multiple times and then set it up as a new device with a new 24 word recovery phrase.
I then transferred the full balance back from Coinbase which showed up correctly in Ledger Live both on my Macbook and on my phone.

About 2 weeks ago I wanted to sell off a portion of the balance. However, each time I tried to transfer to Coinbase I received an error message. After about 4 or 5 failures, I decided to contact Ledger technical support. However they have been very slow to reply and even until now (2 weeks later) I have only received generic email responses advising me to check the troubleshooting section of their web page.

Being impatient, I thought maybe a reset of the Nano S would help fix the problem. First I installed the app on the Nano S called "Recovery Check" and confirmed that the recovery phrase I had written down (the newer one after the firmware update) was indeed the correct one. So I wiped out the Nano S and set up from the recovery phrase.

However, now the BTC balance in Ledger Live on the Macbook is shown as zero. It still shows the original balance on the phone but I don't guess that means much. My thought is maybe it was possible that when I transferred back from Coinbase I sent to the original Nano S key that was set up. I don't see how this was possible as I used Ledger Live connected to the new Nano S set up to make the transfer. I've tried to find the original recovery phrase but haven't been able to locate it.

Any suggestions or ideas from anyone would be much appreciated.