The price increase was due to roll out on July 12, but was released across the company’s U.S. stores on July 1 due to a system error.

Starbucks spilled the beans on a price increase slated for mid-July. The Seattle-based company said that it prematurely rolled out a price increase across its U.S. stores that was actually due for July 12.

AP/Stephan Savoia

"As a result, some customers were charged incorrectly," it said in a press statement on Friday. "The maximum any customer could have been overcharged is 30 cents per beverage. The error has been corrected and we sincerely apologize to our customers for the inconvenience."

The error was resolved by Saturday, according to the company.

Customers who may have been overcharged may receive a refund by calling the company's customer service number at 1-800-782-7282.

Starbucks declined to comment to BuzzFeed News. But while details of the price hike and its reasons are still unclear, people are already feeling the financial pinch to satisfy their Starbucks cravings.

@shenry1 / Via Twitter: @shenry1

There was outrage.

@rustycolbert / Via Twitter: @RustyColbert

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