Thank you all for your helpful comments and suggestions/advice.
To make it clear as some seem confused I didn't want to leave it til the airport check in gate or until I was onboard to move as I just wanted it to be a smooth departure and not have to wait until someone would move assuming there was a willing person. Yes I am probably overthinking it but I guess also it thrw me that all 4 of us were randomly allocated next to each other in the much more expensive seats thatwe have not paid for.
Update: after getting cut off by Easyjet on Friday afternoon I did send a complaint form - apparentky this will take up o 14 days before they get back to me. I also send a DM on INstagram - they eventually replied saying that isnt the serice they want to provide and gave me the number for the Special assisance Team and advised me to call them and they would be able to assist me.
I therefore called the Team today, explained the issue & got told eventually that they cant help me as I didnt book asking for special assistance and if I want to move to an extra leg room seat I need to pay - agaon they missed the point that Im not wanting to move to an extra leg room seat just one that isnt by an exit that their regulations allow me to sit at. They tod me to call customer service.
So I braved Customer Service again. I was told that I had probably been randomly allocated the more expensive seats as I had checkedin so early....
if I want to move I do have to pay their fee both ways as they cannot mo ve my seat without a charge being paid. They cannot overlook a charge on their sysatem which will be generated at their end if they try to move me.
In the meantime I have received several whatsapp mesages from people purporting to be from Easyjet Customer Services wanting to assist me after my complaint.
One of these who called himself Peter at Easyjet Luton said they would move me free of charge but in order to do so they would need to refund me first & then he would rebook me - as you can imagine I found this rather scamlike especially as he was unable to tell me how much I had paid for my ticket or even one name of one of my party. He told me also that the flight was overbooked so as you can imagine I wasnt sure how he could then posssibly move me anywhere - he also sent me a Easyjet complaints & refund form which looked fairly convincing.
The upshot is I didn't believe him - Easyjet have upset me and are not willing to listen to the issue - they just seem only interested in charging me to move and not resolving a problem. To be fair if they had said in a polite manner that they were unable to change the seat now but that they would make a note against my booking so that when I arrived at the airport check in the crew would be aware and may at that stage be able to move me then I would have felt ok - but they have been rude, beyond unhelpful and also were unbothered about the scam whats apps I have encountered - basically they couldnt care less & its a lesson learnt.