You can.
Just call TNB why didnt cut the electricity ? then they will send the red notice again.
After 14 days then you chase TNB again, why no cut? they eventually will cut and tenant need to make full payment + re connection fees.

At the same time also got ppl claims that tenant can sue you etc, but as long you send the whatapps messages with the bills to remind them i think should be ok, but dont tell that you plan to cut the bill la.