Sugardaddyforme Trying to cancel 3 day trial with no response and already billed not known, Internet

I have been trying for 5 days to cancel my 3 day trial..emailed them 6 times have left 3 voice messages.  The phone number they provide 877-783-2339 goes to voicemail.  I have emailed them through the site and to cs@sugardaddyforme.com to cancel.  My bank card has been charged for a month membership.  Does anyone know how to make this stop?  I have no illusions that this company will honor their part of this 3 day trial cancellation policy.  The bank says I can only dispute it when it comes off pending charge and actually paid.  I am pissed! Any suggestions?  Even if I dispute and get it fixed will they keep trying to bill me?