You can easily cancel your viva air Colombia ticket. If you book your ticket yourself then you are also able to cancel the ticket. For this firstly reach on the homepage of viva air where you will find two options book a ticket and cancel the ticket. Go on cancel tickets and entry all the required details. After cancellation, you will get an email of confirmation. After that, you can fill-up the form for refunding your amount.
You should know that viva air is non-refundable. Once you pay you will not get back to you. It can be possible for those who have purchased 'cancel protection'. But there is one way to take your money back. Viva air provides a service in which you can change the name of your ticket. So you can sell your ticket to the required one. If you are lucky then one can buy your ticket otherwise your money can be wasted.