Social security employees change my maiden name

While working on my Social Security payment application the local SS office t changed to my maiden name to my married name. The employees working on my application did this, as in my original application it is correct and every official paper I have gotten to this time has my correct maiden name. I receive a call by the local SS office that I needed to bring in my marriage license. I was married 42 years ago, and only have a "pretty" marriage certificate as described by the SS clerk. I was told I would have to bring in the official license. To order this, it cost $33.00. Why could they not look at my "pretty" license as it is the only one we have and it was the local SS office's problem?