Disconnected for not picking up the phone

I was disconnected for not picking up the phone.

I am one month behind and did make arrangements with one of your agents on the 5th of July and the payment was for the end of July but they disconnected me I didn't picked up the phone but they phoned during working hours and I was busy.

This is totally unacceptable since I've had my contract with vodacom since 2011/2012 but I guess this is what you get for being a loyal customer after all these years.