User Activity

Twice now, I have tried to buy something from eBay, with a discount voucher. The problem is when I hit checkout, so I can apply the voucher, it then says thanks for your purchase.I don't get an option to review or add discount, it just tells me I've ...
this person has had 5 negative feedbacks in 2 weeks, due to non payment and not answering emails, why are they still able to have a 100% positive record, and still able to waste peoples time?
Bought a mobile phone cover, paid for it in November. It shows as posted on 22 November, buyer has sent me photo showing postage details. To date, 31 December, I have not received it! Is this a postal problem? what to do now?
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