Service is bad

I am highly disappointed with Old mutual been a client with you for years ,you introduced a new platform which is the WhatsApp chat , I disinvested on Thursday 12/11/2020 I received an sms with a ref number but to date I have no idea what is happening , how do you introduce such but there is no follow up , how am I suppose to know as a client what is happening now o am calling your head office and no one answers my call like really your service is beyond bad , would someone provide light for me when you debit I don’t give you issues so why should I be inconvenienced and please re look at your WhatsApp platform there has to be more than what you are offering. My contact number *** will provide my details when you respond