Hi. So the wallet address starts with a 1. When I initially set the nano up it did as you said, ask me if it was for legacy or segwit, there was an option for 'I dont know' which I selected as I didnt know. Now each time I go in I select the same 'I dont know'. I cannot find an option on the nano wallet app to find the address that it gave me to send to, to cross reference it to the one I used on coinbase, I am quite sure I did this correctly though as I checkes it several times forwards and backwards and gor mybhusband to do the same. Last night I sent a very small amount on bitcoin I had on my Jaxx wallet to the nano and although not confirmed yet, I can see the pending amount on the nano whereas the amount I am 'missing' only shows as pending on coinbase not on the nano. I know alot of you are saying be patient, which I am happy to do, I just want to know that I have not lost it. Time I can spare. £4.5k I cannot. Lol. Thank you all for your advise and please keep any suggestions coming as it is still not resolved.
The wallet address starting with 1 means it's a legacy address. Maybe it worths a try to select the Legacy option in bitcoin chain, but don't expect much, if your transaction from Jaxx has already showed up... At least, the Jaxx transaction will be confirmed sometime.
You should start asking for support at coinbase, it seems that the problem is at their side. I don't know
the system of coinbase but usually at exchanges, they're waiting for a confirmation before they send out the cryptos to external addresses, I don't know if coinbase works like this (if you have received (or not) this kind of email with confirmation link). At Bittrex, if you start a withdrawal, the first status of the withdrawal is 'pending' and if you confirm at the link in the email message, it changes to 'Authorized' and a bit later it shows up in the blockchain and in the wallet with 0 confirmation first, and later on it gets confirmed.