I have about 3000 and no chance at present to use them in a euro zone.
I really want to put them in my bank account here, but I am told I will lose a lot on the value
Silka didn't say how he (or she) obtained the Euros. If they were bought here, at what rate were they bought. Without this information no-one can realistically advise what best to do.
3000 Euros can be changed at a rate of 1.27 to the pound currently and will probably move to as much as 1.40 over the next few weeks or so. I would sell now.