TELUS Neighbourhood

I have a Telus prepaid account. I use vouchers to buy 30 day plans and add ons. I'm using an Alcatel Onetouch in Ontario.I use the Simple 22 plan, and decided I wanted to browse online. So I bought a Data add on which allows for 100mb I believe.When ...

If I buy a $25 voucher top-up (12 digit pin), and add it to my account. Then sign up for a $22 plan (Simple 22). Will the $22 be deducted from my initial deposit of $25 from the voucher? Or are the two system not compatible? A voucher top-up can't be...