A nightmare CompanyIs

They owe my company March 2020 invoices. I have written them emails several times and I get sent from one person to the next but still nothing is materializing. The last time I emailed Jabu Jambo to enquire and she rep**** and said she send Recons to Wayne Robinson and I should email him, that's what I did (email him) but even today he doesn't reply and I still have received my March 2020 payment.