The main issue here is you seem to have an inability to process factual information.
Savs dig and thats including yours. They dig for many reasons such as for shelter, nesting, the pursuit of moisture or to escape the heat. Many species of monitor are also soil type specific. I could give my ackies 5 feet of top soil annd they won't dig a bit. Change the substrate to a very sand loam and they dig a subway system.
The fact that you state that yours does not only proves that your enclosure and husbandry does not allow for basic behaviors to be expressed.
If you cared about your animal you would be great full this was pointed out to you and would seek to remedy the situation.
