in my experience easyjet customer service is very good so long as you phone up. in my experience if you email you will wait a long time for a response.
on the one occasion i have emailed ryanair in advance of travel i didnt get a reply (even though the email got a read receipt). i've never had to phone ryanair so cant comment on that aspect.
perhaps easyjet customer service is different to easyjet holidays customer service since the website easyjet holidays is operated by lowcostbeds. do the customer service roles sit within each respective organisation?