you submitted your application in Nov 2018.....takes around 3 months for AOR.....so to avoid return of your application.....pay the fees online immediately......send a copy of the OWP fees ($255) payment receipt and a copy of your earlier paid sponsorship fee ($1040) receipt through IRCC webform to the visa office (IRCC Mississauga - inland sponsorship)......you may include an explanation note.
Thank you Wakki, I've paid the fee and sent the receipt out this afternoon.. Hope that works...Fingers crossed..