poor customer service

I have a subscription with jacklin services, I was making bank pmts, but due to work been so hectic, in december I sent them bank details, after numerous emails, they finaly used my bank details at the end of february, I received my next issue, but I am missing 9 books, I emailed them to inform them of this and there response was due to non payment of your account, we cannot send you these back issues, unless u pay upfront.. To me this is shocking service, and I think I will be canceling this subscription, I have a subscription with DeAgostini, and I am also missing books, but they have made the effort to send them to me,