missed call - the last 3 days... no message left

Caller: Sumo

several missed calls the last few days and no message left. called back at was Sumo energy

End and said I’d been looking at their energy website, I missed the name. He knew the postcode. I said I wasn’t looking anymore he thanked me and call ended

I picked up, no answer and it cut out

Keeps calling but never leaves a message.

Pretty sure it's Dump energy

Missed call last 3 days, no message left, try to call back and after picking up the line cuts out.

Caller hung up as soon as I answered

I rang once and got disconnected