[pvaldes]

They could focus this efforts into rebuilding their brand public image from a personal web without relying too much on a third part (that could vanish, or block the access at any time).

Free stuff comes with a price, and can be expensive. If this account has been hacked could be used to taint their data and destroy the brand image, or falsely claim that they are closed in Saturdays, or diverting a part of their clients to a different restaurant.

All of those could be very difficult to spot before is too late so, recovering the access to the account is only the first part, and a small step, in the solution. They should watch for subtle malicious changes and double check everything written on it and every link provided in the account.

While letting the deactivated account rot, hiring a local programmer to create a personal web (starting from scratch and explaining on it that you moved), and investing some money in local advertising, could provide much more bang for the buck.

The clients could find the Instagram account deactivated? Provide a replacement. They will just jump to the next link with the original web in two seconds without even think twice about it. Specially when the company is very small, very local, and the place is specified in the brand name. (If your company is named something like "the best patties in NY" the risk of somebody creating a fake company in Atlanta and taking your clients away is really small).