Blue Cross Blue Shield Association [BCBSA] review: Mistake made by BCBSNC but is my fault

They overpaid two claims. They sent me a letter that if I don't pay by a certain date, they will send the payments to a collection agency. I have two make copies of both claims. I have to mail each one to BCBSNC. I have to go and make copies of each letter and pay for them. I have to buy envelopes and stamps. I do not have checks, so I have to go the bank and get a separate cashiers check for each over payment. I have to go to the Post Office to mail the letters. You don't put letters in your mailbox anymore because people steal mail. The expense of using my car, gas and time is not taken into consideration. Why can this not be done online? I have to do all of this because BCBSNC screwed up and it is my fault.