Totally agree, rather than waiting and sitting in ambiguity, just email them and explain them that you submitted the form, and explain your situation. Quote Application File Number and date of submission and how did you submit the RCMP report. Good luck!Did you by any chance scan the RCMP certificate?
Can you see on MyCIC if you can upload it over there? When did their medical and initially police certificate was submitted?
I would say do not waste time waiting for them to reply to your web form request. Try to see if you can upload it on MyCIC or if not draft a letter and explain to them that you already mailed it in June. Attach your receipt for proof and also attach photocopy in the letter and mail it to London Visa Office ASAP. Also in your letter do not forget to write their Application number.
Good Luck!