HeyPeach review for Omnisend Email Marketing & SMS

We recently discovered when chatting to a customer that they didn't receive our latest SMS. Upon further checking, they didn't receive the last 9 SMS either, neither did most of our US customers. There was no notification of this within Omnisend, I had to check the customer record to see the SMS has failed. I guess it's in Omnisend's interest to keep the fees and not alert customers when their SMSs aren't delivered. Checking in with customer service, so far the only explanation I've been given is that we haven't verified our number. This is despite a) 9 of the 10 failed messages were before the date verification was required, b) we have never hit the limit set by number verification. Currently I keep getting the same answer from customer service whose only line seems to be to ask us to verify our number. I will keep pressing. Further investigation has revealed most emails end up in the spam folder too. What are we paying for here? At this rate I'll be asking for a full refund!