I'm in an old house that has been mostly rewired in the last 15 years. I am in the USA so the power should be 110V, 220V but that is not the case. All day and night the power surges from 110V to 140V for about 6 seconds then back down again. If i unplug the 3 prong outlet from the 110V stove the power in the kitchen drops to 75V and the rest of the house goes to 170V. I tested the power coming up to the apartment and it checked out perfect. When I tested the main lines coming into the breaker panel and one side is 110V and one is 140V. I pulled the main breaker and checked them again and there is no voltage at all coming into the box when the fuse is pulled. Everything I know from dealing with electric service says none of this should even work. Also I noticed a gas leak a couple weeks ago. The copper gas line was up against an old gas line and had arched a hole right through the copper. Not sure if that helps but any ideas at this point are welcome.
You have an open or compromised service neutral.
PLEASE call your power company immediately to have them check their connections.
It is also very possible you'll need an electrician to check/repair/replace the terminations in the meter pan.
I have to ask, do you own this house? If not then calling your landlord is your ONLY option.
It sounds like a floating neutral because the box was not properly earthed. A main breaker panel needs a good earth of appropriate guage. It is where earth and neutral are tied. A sub panel usually does not have earth and neutral tied.
The voltage problem was an unbalance of the load on the two legs.