Hello Chelsea and welcome. I started my IVA journey with Tenon, having rejected GT due to their (then) poor completion record. I was subsequently transferred to GT when they took over Tenons case load!
To say I was not pleased would be a massive understatement (and I let GT know this!). But, to my surprise, they "saved my bacon" more than once and I found the front line staff to be excellent. I can't say that I am impressed with the way the company does business, but cannot fault the way my IVA was handled.
Hopefully, when you get to the other end, they will have sorted out the PPI issues and be back to their normally woefully slow processes

My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014