Call center unable to get address and contact details correct.

Have had to deal with CCD couriers over a number of years now and it is highly frustrating. FNB entrust them to deliver credit cards. Usually they place a call to confirm delivery address. As I'm the owner of the business that has many credit cards in use I'm the first person they call. Would not be a problem were it not for their telephone systems which must be one of these cheap VOIP solutions. Practically impossible to relay a phone number nevertheless a delivery address. They insist on communicating on phone and refuse to accept SMS or whatsapp confirmation. I really don't have 10min to labour through correct delivery details and still be in doubt as to whether they have it correct. Invest in a better telephone system or verify details via sms or whatsapp pls.