New construction - Energy consumption of the heat pump / electric auxiliary heater

We have built a solid single-family house with a heat pump. We moved in on 01.09. of this year. I am very worried about our heat pump because it has consumed 1500 kW in just two months. Today it is almost 200 kW higher again. September and October were also unusually mild, only two days were colder with ground frost. The heating engineer as well as the construction company consider it appropriate; I do not need to address them again. I have read up on how such heat pumps work. I looked at the energy consumption of my pump more closely (see photo) and found that the highest consumption is attributable to the auxiliary heater - 1288 kW. What do you think about this? Is something wrong with the settings? Is the compressor not working efficiently? Should the auxiliary heater not only switch on at significantly lower temperatures? The heat pump is an air/water Logatherm WPLS 8kW from the company Buderus. Thank you very much for your opinions.

A few more details about the house:
1.5-storey single-family house made of solid construction according to the Energy Saving Ordinance 2018, 156 m2

Ui something is definitely wrong. How can the heating technician say that this is normal??

The auxiliary heater/heating element must not run as a rule. It may kick in briefly if it is -10 degrees or colder.

Bivalence point at +10 instead of -10? Or maybe the compressor keeps failing during heating because the thermostats of the heating system are closed, resulting in insufficient flow, or something else with the hydraulics is wrong.

Read through the manual of the heat pump and check all settings, error logs, current consumption displays, etc. that you have access to. Try to understand what is going wrong and how the heat pump behaves at what times and when the compressor runs.

Alternatively: put pressure on the person responsible. Nothing about this is appropriate.

Or contact the manufacturer directly.

One could deliberately deactivate the electric heating rod. Let's see what happens then.

The heating element may only turn on in emergencies, but here it runs continuously.