Get some dolomite lime from Lowes or HD. Cost ~$5 for a 40lb bag and will take care of your issues, no problem.
I have been growing in peat based mixes for close to 40 years. It's good stuff and easy to work with, as long as you realize it's acidic and must have lime added. This goes for ANY peat based mix, even the fancy expensive ones.
It is simple and cheap to do and often overlooked. That's when the problems start. Lime is the second ingredient added to my mix, with the peat moss being the first.
Get some, just make sure it's NOT hydrated.
Wet