Poor Service from PPS

I had an RA with PPS and requested retirement from it, with the remainder to be transferred to an existing Living Annuity that was started after a withdrawal from PPS in 2018. Now PPS want to to provide with SARS tax number and registration numbers for Sanlam. I don’t work for Sanlam and obviously can’t get that information. The PPS advisor should discuss directly with Sanlam as this is a repeat transfer and the details should still be on PPS records.