Credit card payments on slow links

I have been making some credit card payments of a few sites hosted in India. Most worked well; however I have seen that most of the times the process is slow. And it is pretty scary to get a “Connection timed out message” after I fill my credit card details and press the “Submit” button, since I don’t know if the transaction went through and succeeded; did my credit card get charged, did the money actually go to the target vendor? This problem will be particularly aggravated on slow links.

I wonder if there is a solution to this problem. To restate the problem – “how can a vendor ensure that there is a delay of maximum 1-2 seconds after pressing the submit button on a credit-card-payment page and before the next page saying ‘Thanks for making the payment’ comes?” I usually see a delay of almost 1 minute, which sucks.