Unfair bullying by bank after arrangement in place

I have made an arrangement with MFC i spoke to Godfrey More on Thurday 28 May 2020 to pay R4000 a month for 8 months this was approved i received a sms advising and reminder smses i have started paying my R4000 then on Wednesday i receive a rude email and sms from Rachel Verveen saying that the arrangement cannot be accepted i must pay the full arrears immediately or hand the car back to the bank ...what horrid service is this after i ran around trying to contact MFC to make arrangements i even spoke to Candice who confirmed my arrangement now they sending people to my home during lockdown to intimidate me this is not treating the client fairly.