there is a billing problem with a previous purchase.Please update your payment method...i already update still cannot

In such a situation, I suggest that you contact the iTunes Store Support Team directly, using this link:--> iTunes Store & App Store – Get support for various issues, and choosing: your country, then Apple ID, then iTunes & App Store. If your problem is not among the options shown there, tap/click on the option “the topic is not listed” and describe your issue.

Regards

Giulio