I joined one company on 8 June 2020 and left the same on 20 Oct 2020 after serving the notice period. I had a relieving letter and an experience letter of the same dates as mentioned above. However, the company continued sending PF contributions to my PF account until Mar 2021, despite my departure on 20 Oct 2020 and subsequent joining of a new company on 21 Oct 2020. This resulted in an overlap of 6 months on the PF portal. My previous employer has acknowledged the error. How can I rectify this issue?