Maska review for Omnisend Email Marketing & SMS

I was using Mailchimp and I decided to switch to Omnisend because I thought it was better for Shopify (note: and it's more expensive). For the past two or three months, my sales have dropped, half of my customers don't get the emails, I had problems with the sync between other small issues. The support changes all the time so you never speak with the same person and every new person answers you a random answer. I asked to speak on the phone with someone in order to solve all this issues and they have no phone support. This app was a very poor choice.