My bank account was charged twice for the taxes I owed

I owed 265$

I went through the IRS website to pay it.

That was April 3rd, I was charged immediately.

On April 15th the IRS took the 265 out of my account again. What the heck! how to I get that back? I was going to file a dispute with my bank since it was charged twice.

Any advice would help, thanks.