Wrongfully Billed for PRO membership Can't Contact support

I signed up for a PRO membership with Musescore under a free trial on a different account before and I was aware that I did not cancel the PRO membership before the free trial period was over so I was granted a partial refund. However, I tried to login to a different account and was billed for the PRO membership on this account when there is no payment history on this account and it still offers me the free trial. I do not understand how I was billed for this amount because I didn't even cancel the membership and I have no PRO benefits on this account at all. I received a Email saying I could either accept 10 additional months of PRO or a 35% refund and the standard year membership for PRO. If I already signed up for the free trial, why would I be given another free trial. It doesn't make any sense. And I also am unable to get any PRO benefits at all which is another thing they lied about. This is the worst customer service experience I have ever had with any company. I contacted them through email regarding this issue and I haven't heard back in 5 days.