The shop hired the courier, the contract is between them and it's not your problem.
But it doesn't sound like they are being very co-operative, so I wouldn't waste any more time sending them emails and just pursue a chargeback with your credit card provider.
The shop hired the courier, the contract is between them and it's not your problem.
But it doesn't sound like they are being very co-operative, so I wouldn't waste any more time sending them emails and just pursue a chargeback with your credit card provider.