Horrible customer service, the app did not work, I have reached out 4 times in the past two days and have not been responded to

I don't mean to leave a review but I couldn't find another way to ask a question. I set up FreshCredit as per the video, walked my customer through the steps as per the video and his credit didn't show up in check out and he got fed up and just ended up paying which was rather embarassing. Could you pls help me figure out/fix what went wrong pls?

I wanted to use this because we do not allow order cancellations and wanted to be able to with store credit. Unfortunately the software does not properly sync customers

Customers are not able to see these credits at check out. Didn't solve our problem.

HORRIBLE. Because it doesn't work. Customers are trying to checkout and can't because the credit isn't showing up in their account. I literally have to send screen shots to show people it is in there.
AND, a customer cannot use a coupon code and their store credit at the same time. That is insane. A store credit is like cash. Why would you not also be able to use a coupon and cash.
This needs serious work.

really bad I am trying to add a new customer and it is not working! this is really Bad

Doesn't work if you're using a tiered pricing app like BOLD. It will simply remove the tiered pricing level already given to your customer before allowing them to use store credit. Which sort of defeats the whole point of the app. Absolute waste of time.

Uses a discount code, so if your customers also have a discount code they want to apply, like during a sale, they can't

We've used probably 30 apps over the years to manage our store, so we have a lot of experience. This one has to be the worst by far that we have ever come across. Seriously. It's that bad. Don't even waste your time.