Arrear Amount

I am very unhappy with how Wesbank is handling my account. I have been a Wesbank customer since 2012. To cut the long story short last week i phoned Wesbank informing them that my payment is gone be late as i am currently unemployed recently started a business so i am waiting for my clients to do payments. Then i did the payment on Tuesday the 21st of December. To my surprise on Wednesday i get an sms from a lady named Annetjie informing me they coming to repossess my car. How is that possible?? I made an arrangement to settle the arrear amount which i sticked to, it was only this month where the payment was late however Wesbank was informed about this!! Now both Annetjie and Wesbank they telling me that arrangement is no longer in place how is that possible thou? As Wesbank was informed the payment will be late. Is this how you guys treat your customers??