Playstation Plus account issue

Hello all I hope everyone is doing good. I have a kinda weird/interesting (to me.) So on the 27 I changed my billing for my PlayStation Plus account to every 3 months, I got a confirmation email back and everything. On the 1st my account was charged for the full year even though I already changed my plan. So my question is. How do I contact Sony to get a refund and have this fixed (if I can) ? My thing is I don't really have the money and that was the whole purpose for changing it to quarterly rather than yearly. Any help would be greatly appreciated, thank you.