Moreover the acoustic of your lessons is very bad with people talking with awful accent and sometimes shouting to express themselves....
If you do not receive a lesson, there may be one of a few possible problems:
You may have selected only certain days on which to receive your lessons. Check which days you have selected (at the bottom of any lesson). It is possible that there has been a change to your e-mail account settings, so always check your spam/junk folder to see if your lesson is there.
We have taken your comments regarding audios into account. We try to make our lessons contain a variety of accents and realistic conversations in terms of dynamics and manner of speech (we always use genuine actors and native speakers).