Data Transfer rate prior month now 5,696.2%

Hello everyone!

Is there a way to reduce the number of regions that are set as default? I am on the free plan and we only pay for the storage we use. Last month our data transfer rates went over 5,000%! Our normal bill is $20 monthly and now its nearly $300.

We do business only with a select customer base, not the general public and strictly only in the United States.

We provide newsletters during a few months out of the year and update the newsletters each month and provide an updated link (made public) so our affiliates can open/download the newsletter.

Other than that our tech support uses the stored links to push installations for our program onto customer pcs to get them setup. We only do less than 8 of these installations in January every year.

Can anyone provide advice aside from making our s3 buckets private, deleting old files, adding a budget, and an or setting alarms?

I've done as suggested, but there's no room in our IT budget for the premium support. Any suggestions or advice is greatly appreciated!