I've been getting calls from similar numbers (Call Centre from India) asking if I've received the latest details from my current gas/electric provider on the new increase in fees. they want to make sure I'm getting the best deal possible blah blah blah.
0480 853 513, 0480 853 516, 0485 856 871, 0480 841 520, 0480 853 604

Get these numbers all the time - the last few digits are different. Blocked.