Poor poor service

On 2022-03-25 a payment arrangement was made with Haydar Khan ,Specialised Collections Manager email:hleken2#wesbank.co.za contact number:***.The arrangement was for the payment of R4729.00. A person with the name of Pumla Mabena tel.no.*** email:*** has now send me a document for the demand of legal fees as it states in the document that i am R632.50 in arrears and wants to hand me over to the lawyers. Do they know their job ?