租学校宿舍定金如何付的问题

03130327UID: 3949983

本人要在开学第一个月住在学校，目前预定了名额，学校发来邮件，要求付300CAD定金，然后预定才能完成。
Thank you for your application to live in residence for the Spring Summer Term 2019. If you have not already done so, you should pay a $300 application deposit.  This payment must be in your Brock student account in order for us to process your application. You can see a list of payment options on the Finance web site. Please check your Financial History on the Brock portal (my.brocku.ca) to ensure that your payment is safely received.

Application Reference #:  XXXX

Application Deposit Amount:  $300 (due immediately)*

*Once your application deposit is received then your application will be processed within 10 business days.

本人上个月已经付了15,000CAD学费定金，发邮件问，学校告知不需要单独交了，去financial history看有没有扣除。’
Thank you for your email. The $300.00 should come out of what you just paid, however, the best way to ensure this has been completed is to log into your (my.brocku.ca) and check your financial history. You can see what deposit you have made and which fees have been paid.

目前看了还是没扣，请问我还需要什么操作吗？还是等学校扣。我希望赶紧预定宿舍啊啊啊。
求大神指教！