Warbands is the only pvp content that's active in RS3 currently, which is once every 7 hours. In all honesty if you only really play to pvp, you'd have a better experience on oldschool
Have you tried running the client in safe mode? I remember I had a similair problem a year or two back, I belive the way to do it is to hold in the 's' key on your keyboard while the client is loading up.
Just swapped 150m RS3 with this service.
However, on the live chat it said about "special rates" if you had a sythe account, when I asked about this, the response from the person on livechat was "k", and I got the standard rate.