Over charged

Today I paid $14.99 for gems but I was charged $18.99. How come?

You should contact SG directly with the details of your transaction. Use the ‘Submit a request’ link on the following page.
https://support.smallgiantgames.com/hc/en-us/articles/360000542934-How-to-Contact-Support-v1-9-7-onwards-

Overcharged again $49.99 becomes $77.98. Please help.

You should contact the support, no one can help you on the forum. Paulon gave you the link.

I’ve had the same issue a few times and just now I ordered 400 gems for 4.99 and was charged 24.98. I’ve sent out a ticket already from the last time with no response. Starting to get pissed.