BTC Issue

So over the past weekend someone had canceled a fairly large transaction and ever since I haven't been able to send anything... It will either come up as not spendable or it will sit on the block for 12-24 hours and then nothing happens. I've contacted block-chain support (my wallet provider) and have asked them but they're no help. Has anyone had this happen to them before and found a way to resolve this? I would also like to add that I have more than enough funds available so this is NOT the issue.

 

Your able to chargeback on a btc payment? If so thats a problem looking to start my own gold shop using only BTC.

 

As fair as I'm aware only if it hasn't got 1 confirmation then issues can arise such as double spending.

 

Similar to what @DesireX said, once it has confirmed at least once, the BTC is yours. Once it's actually in your wallet it's completely irreversible.

 

This is completely false, eventhough it seldomly happens its possible to reverse a payment by double spending it even after it received its first confirmation