TrackSpikes.co review for PreOrder Now Backorder WOD

I have used this app for 3 years on and off when I need to do a pre order. This time when trying to use it the pre order function did not display on my store which I understand happens with various themes. I contacted support who for the first 2 days just kept refreshing the app and asking me to wait. It still didn't fix the problem. For 4 more days now support keep telling me to wait as the tech team are reviewing the issue. I have not had an update on the issue in days. The support is poor for this app and I do not write this likely as I have never had a problem with the app before. I am left with no option but to uninstall this app and use another one available.