I believe you can double check this for yourself by logging in, then clicking on "my pledge" at the top of any forum page. The page you go to will start out saying
The plan you are currently subscribed to is: XXX's Pledge
You are currently paying: One-time fee of $YYY
If it says you paid $350 for a pledge, you're good.
If says you have a $250 pledge, you should contact support to see if they can upgrade you.
I would hope VR upgraded you when you did you 2nd pledge, but accidents happen. The Support people are friendly and helpful. Never hurts to ask them a question about your subscription.