First of all, this is wrong. However, in the process of misplacing the materials, there is another barrier, that is, after the operator operates, there is another action of shelving, that is, QA will check and confirm again and sign. So both you and QA are at fault in this process.
Then, you should go to the supervisor to report the occurrence of the wrong material, and you can directly describe the above process. But there are still countermeasures.
The last step is to give your countermeasures. Judging from your description process, it seems that it is only manual confirmation by the operator and QA. It can be suggested to increase the way of scanning bar codes, and finally prevent errors through the network system, which can effectively prevent such errors.