The calls were scam calls, as you already suspected. There are various organisations which deal with different types of nuisance call (a reasonable list of roles/responsibilities is in the link below)
https://www.tpsonline.org.uk/pages/nuisance
Unfortunately, reporting each call is time consuming and won't result in any individual action to lessen the number of scam calls you receive.
The automated scam calls are best dealt with via a call screening device/phone.