When thinking about different types of support, take into consideration that it significantly depends on target audience. For example, older audience prefers support via phone, while younger audience prefers live chats.
That's why it's important to have different options to contact you. Ideally it should be all 4 options:
- Phone number
- Live chat
- Contact us form.
In that case all types of customers will be able to find the most comfortable way to talk with you.