Impossible to get any feedback

On the 11th of March I was instructed by the call centre to send a mail to [Email Removed] with the wording: \Please downgrade my account (***) from an ADSL line to a normal voice line"and attached all the necessary information as instructed by the call centre.<br> <br> On the 24th of March I phoned the contact centre to inquire whether my cancellation email was received. I was told by Buyi that I have to wait for 30 days before they can even tell me if my email was received and that I must phone back on the 12th of April.<br> <br> I phoned back today and after holding for 30 minutes and 46 seconds was answered by a rude woman saying: \""What do you want?\"" Instead of swearing at the rude woman"