Cancelling purchase advice?

[bpl521_sell]

To make a along story short. Received $10.00 off coupon from Ebay. Purchased item on ebay but could not redeem coupon. Realized I purchased under my buying account when the coupon applied to my selling account. Cancelled the order within 15 minutes. Did not pay and sent the seller a message asking to cancel transaction and I would reorder under the different account so I could use the coupon. No response from seller after 3 days. Purchased item shows as pending cancellation. I select item details and item shows as not existing. Suspect I have been blocked, or as usual another bug in their software. Will I receive a Unpaid Item strike. Just received a reminder from Ebay to pay. I thought Ebay put a policy where you could cancel a order within 60 minutes or something like that without penalty. Any advice moving forward. 

[bpl521_sell]

Thanks. I do think Ebay is just a little too cozy with buyers though. We have all had buyers that threw off the spidey senses and you just know it's going to go bad, but Ebay in away forces you to complete the transaction and then have to accept the consequences later which it's usually in the buyers favour. 

I think if the rules were relaxed a bit the good sellers would thrive and the sneaky buyers looking to game the system would face additional hurdles.