Try it, absolutely still try it, and good luck!
There's a bit of mis-information here.
First, while credit card companies and banks can chose to honor disputes of any age, your rights under the FCBA protect you for only 60 days -- and the FCBA doesn't apply to debit cards at all.
My tip -- that you should never use a debit card and with credit cards you should dispute charges before paying the bill -- is correct in spirit but not in the letter of the way I worded it, so mea culpa on technicalities but the point is correct. The FCBA only grants you 60 days to dispute a transaction (after the statement cut, not the transaction itself).
Also, CC disputes have some consequences. Companies aggregate & share lists of customers that have charge-backed. Finding yourself on the list can see you turned-away from legitimate, good businesses that have to protect themselves against dispute-prone customers.
In many cases the cc company debiting your checking account is automated and there is no step for you to verify other than to periodically go through your statements to see if you have taken on any ghost charges.
As a customer of the card company you have the right to dispute charges as far back as you want, whether they'll honor that or not is a different question but typically up to 6 months in a card-not-present situation should give you no problem at all. And once the complaints about this company start rolling in it will get even easier.
Mass chargebacks are a very powerful weapon in the hands of organized consumers.
Not when it's lumped into a single balance that you pay significant monthly interest on.