Hi, your timeline is crazy! I applied on January 20 here from Netherlands and currently afraid to repeat your situation. It looks just desperate that we can't do anything about their processing time. 12 month is just a shame for London IRCC. I need to visit Canada for business in June and seem not very optimistic right nowToday I got some surprisingly good news - after 12 months, visitor visa application is approved!!
Moral of the story, you can't do anything - the London visa office which handeled my application copy pasted the usual bs that they are busy 6 months ago and they haven't responded to my comlpaint yet, but visa request got approved!