UIF - No response

I got a payment from manpower, more than 18 months after retirement because one block had not been crossed out and nobody had informed me of the mistake. it was only after enquiring after having a stroke that this was brought to my attention. I eventually got 1 months payment, I was told that the next payment was due un 18 February 2022 but I would need to go online again and do a "Continuation of payment". I did this on 19 February 2022 and got a reply on Thursday 24 February 2022 that my case number *** had been processed and the funds would be paid into my bank account within 7 days. It is today 8 March 2022, 12 days after the notice and I've received nothing. I've queried on the UIF website - No reply, I've written to the people at manpower who I have previously corresponded with, but my emails come back with "Your message wasn't delivered because the recipient's email provider rejected it." It seems that something has happened to my payment and my emails are being refused by the officials who were working with it. What is a person supposed to do?