Could you please translate this sentence in English?

实在很抱歉，9月19日无法交货，现在严重缺货中；
收到款未交货的订单今天早上已经排到9月20日了；
具体交货时间要收到货款后确认，估计还会往后；

We are so sorry that we can't deliver the goods on 19th Sep as we are out of stock seriously.

 Order forms which haven't been delivered to customers has been routed to 20th Sep this morning.

The time to deliver goods is depended on the confirmation of receiving payments. Maybe the time will be postponed.