Belkin and Apple customer support

How do I complain to APPLE about Belkin products and 'service'? I purchased a screen saver, had it installed at the store, it was cracked within 6 hours and I had not dropped the phone. Returned to the Apple store, told I had to deal with Belkin direct. Belkin wants $15 postage to replace the product that is under warranty. What an absolute rip-off. I paid the money and now my order is 'waiting to be fulfilled' for 25 days! No way to find out when it will be fulfilled. When complaining to the Apple store manager it was very evident they could care less. Suggested I email 'feedback@apple.com', which promptly bounced back. I am so disappointed and upset. I thought Apple stood behind everything they sold in their outlets but apparently not and they don't even want to hear about issues. Anyway - I cannot find any other contact info for complaints other than this board. If anyone can provide email contact info I would appreciate it. Thank you