Online vs in store


So I bought this dress from Charlotte Russe that I had seen online and I saw it in the store so I went ahead and bought it, online it was on sale and in store it wasn’t. I asked the cashier “this dress is on sale online, is this sale only online or can I get it here in the store.?” I also had it pulled up on the website on my phone. and she just looked at me like she didn’t know what I was asking and then paused, looked at her computer and said “no it’s not.” Smirked and then proceeded to ring me up.

Should I go back and ask about it? Most stores I’ve been to will usually match the price that they have online.. I thought about just ordering it online and then returning it but I need the dress for a wedding coming up and im concerned about it not arriving on time.