Calls throughout the day and no one there or hung up as answered. Coincides with text from SUMO

Caller: Sumo

Has been calling 5 or 6 times a day for about 2 months. I haven't been answering because I didn't know the number. Today I called back. It's Sumo, whatever they are, and it goes straight to a recorded message asking me to push 1 etc. Blocked now.

Rang like 10 times today, lucky it went to blocked.

Calls multiple times a day, no one there and never leaves a message

Calling multiple times daily never leaving a message. Suss!

Have blocked number as when answered no one spoke. They continue to call several times per week. 10 calls in one day alone!

Caller: Sumo

After looking for a better electricity price, I found through the government compare site the energy provider Sumo. I wanted to sign up with them and stopped, when they didn't offer a monthly bill payment and they had only direct deposit options.
Short after I received calls to my landline number from 0485 814 102, but as I didn't know the number refused to take the call. Since today I receive calls on my mobile without giving them my number, so they somehow stalked my number from somewhere. The good thing is that the calls were strayed blocked by my provider. I will complain to the government compare site about the behavior of this company and everyone should be careful with dealing with this company.

Called 3 times today and twice during the previous 4 days. Blocking now.

Caller: Sumo

After receiving 4 unanswered calls in the last week, I rang back -- the recorded greeting was from Sumo (electricity provider). I hung up and blocked the number.