I think your issue is the offer.
Your offer says, “Get Approved Now”. It seems unusual to ask a customer to get a mortgage approval within seconds of learning about your company. (Unless, things work differently in Canada.)
Your call-to-action is worded as if you are attempting to do a direct sale. Typically, the rule in advertising is: “the bigger the decision the harder it is to sell directly” and thus the need for a lead magnet (as mentioned by Sean above) so that you can follow up with an email or phone call.
In other words, a mortgage might be too significant to be sold in such a direct way. (I know pre-approval is quite the same as actually giving someone the mortgage, but it may still feel like a major step for the customer.)
I recommend you consider the following questions:
1. Where is the customer in the decision process when they’ve used the Google keywords your targeting? It could be that the customer is still learning about their options. If so, a better offer might be something like, "Get This Free Brochure That Explains Your Home Financing Options"
From there, you can send follow-up emails to build a relationship with the customer so that when they are ready to get their mortgage your company is the natural choice.
2. Is this the sort of step customers feel comfortable taking when first finding out about your company? Since you are an established company that has been offering mortgages successfully for a while, you have a wealth of sales process data already sitting in someone’s head.
It might be worthwhile to review the sales process from your existing successful channels to figure out what questions and concerns customers usually have before volunteering their information to get approved for a mortgage.
Then make sure you’re not skipping those steps on your landing page.
If you’re trying to skip to the end without addressing those same concerns that your sales people hear on other channels, then the landing page will never get the inquiries you’re hoping for.
I hope that helps!