Can I use two vpn together in my iPhone???

Yes you can use but not simultaneously. You can add more than one vpn to your iPhone but can only use one at a time. Other way to use both VPN at the same time is that you can have an additional router to connect both the VPN at the same time. For more info upon this, you can have a look at these answers https://www.quora.com/Why-cant-I-use-two-VPN-at-the-same-time I hope this will resolve your issue regarding it.

You can have more than one VPN setup but can only turn one of them on at a time.