User Activity

I had 2 feedbacks and left 2 for the same item, didn't realise until I saw the 2nd showed up on my feedback list. How do I cancel the first incorrect feedback I've sent?
How can I complain directly to eBay to get funds back that they took from my bank? Does anyone have an email address I need to complain ASAP, I don't want this happening again and I want them to refund me! I had a refund from a seller, approx £12 but...
I am very unhappy that eBay are not taking calls yet to help buyers. A seller has not refunded me after I sent 2 receipts to prove item sent and post office confirmation that they received it, so they are obviously trying to scam me. Is there anyway ...