works, but not correctly

I chose this app and it worked, except for an error message that my customers kept getting for no reason. I put in for a help ticket that was supposed to be responded to within 60 minutes and now here it is 24 hours later… I looked for other plug in options and I found one that worked perfectly and 1000x easier. With this plug in you had to enter billing info twice and with the new one I downloaded it worked perfectly with my theme design the first time.