I have plumbing cover with British gas I need someone to sort a plumbing problem they are meant to come today between 8-6 I've already rung once to check if they are coming, they usually email to confirm but hadn't . I rang and they said it will be any time before 6. Would you ring now to double check or leave it till 6? I'm worried they will say they can't make it today and it will be weeks before they come out.