Slow speed (Homespot)

Hi, I’ve the Homespot M plan and it was fine until now but the speed went from 35-50mb/s to barely reach 10mb with a huge inestability, oscilating up and down to a few hundreds of kb/s sometimes. My internet is going really slow.

My ort is 30900, in Bennemuhlen (Wedemark) and I would like to know the source of the problem and when it’s going to be solved if it’s possible.

Thanks in advance.