Too Busy to answer e-mails regarding queries!

This happened on more than one occasion where you do a query via e-mail to the account department of mentioned medical Practitioners and they refuse to answer your e-mails using the excuse that they are to busy to answer e-mails. (Another excuse is that one person in accounts was on leave and the other person do not answer e-mails). The e-mail address where they have sent the account from is NOT a NO REPLY e-mail address!<br> <br> All I've requested was an explanation regarding a co-payment that was billed to my account of which my Medical Scheme knows nothing about. Also why my account was only sent to me via e-mail almost 60 days after claim has been submitted to Medical Scheme.<br> <br> Is it really so difficult in today's technology to answer a simple e-mail?