Apparently, it’s more sophisticated than just scam phone calls these days. You need to be more careful than merely blocking calls. If you are receiving calls from scammers, ask yourself how they got your information in the first place.
There are people who gather your details from public databases, government websites (it’s shocking that the UK government still posts directors' full names and dates of birth in this day and age...but I digress), LinkedIn profiles (I never connect with anyone I haven't met in person), and social media profiles. Some even post "ghost jobs" to collect information if and when you respond.
In the DR, companies (especially utilities) are quick to request and take copies of your photo ID, passport, etc. You never know how securely this information is stored or if it might made easily accessible to someone for a few $$$.
My point is - If and when you start receiving calls from unknown sources, consider how they got your number and what they know about you—and who else might know.
So, guard your data; They do say , after all, that 'prevention is better than cure'.