Wall outllet is 220v, idk about the breaker. Also do you advice to use AVR ?
Using voltage stabilizer is indeed a great idea technical wise, do not listen to anyone who says otherwise.
Economically, using those stabilizers might not be a great idea, so I will leave it this way.
You also did mention you had a AVR3000, notice that most of those devices are rated in VA (volt*Amps) which is not exactly Wattage, at best case scenario you are looking at a power factor of 20% so you have to multiply that 3000*0.8 and you get 2400w which is noway near what Antminer T17e needs, you will need at least 3600-4000VA.
also we will change the amp breaker to 20 and a lot of things to be fixed.
Changing the breaker won't fix the overheating issue, 20AMP MCB is the minimum safe size, however, just by replacing it - the wires won't run any cooler, you need to replace the wires from the 20amp breaker to the main breaker.