IPhone app to call toll-free numbers?

I'm a prepaid plan, and I hate calling customer service on my phone since it takes so long. I usually use Talkatone for calls, but for some reason it doesn't work for toll-free calls. I've tried doing some research, but haven't had any luck. Anyone know of Apple App Store app that can solve this problem?

Added (1). Sorry for the typos.

You can't use apps to bypass minutes when calling, it doesn't work that way. Apps can talk to apps if both install it.