While there is a universal maximum contribution, your personal contribution depends on the kind of insurance you had for each of the 12 months. If your insurance coverage was not correct, and you had an excess contribution and did not remove it, you should have been charged income tax and a penalty. Check form 8889 and 5329 included with your tax return.
If you paid a penalty, that can be reversed and you can get that refunded to you by making a special corrective withdrawal from the HSA account before April 15.
We would need a lot more details to help you though.
