I don't believe any credit card companies allow payment for tobacco online. Neither do ebay nor paypal. That pretty much means you just can't do it.
e cigarettes don't have tobacco in them.....that's why they are e cigarettes. They provide the nicotine, and flavors
We buy them online all the time. I'm not going to give the site name here as I've written about it in other threads.
If you wanted to buy them, all the OP has to do is google e-cigarettes.