This is the 2600th most frequent Portuguese word.
havendo
"Having" or "existing," often used to indicate the presence or occurrence of something.
In this sentence, 'havendo' introduces a conditional clause, implying 'if there is' something.
Havendo tempo disponível, podemos visitar o museu.
If there is available time, we can visit the museum.
Here, 'havendo' is used to denote the condition under which something is true or applies.
Não há problema havendo consenso entre os membros.
There is no problem if there is consensus among the members.
'Havendo' in this case sets up a context where certain actions (contacting) are expected if the stated condition exists (doubts).