(Adds details on Evergrande bondholder call, Fantasia restructuring plans, R&F downgrade by S&P) By Marc Jones LONDON, Oct 8 (Reuters) - Chinese property firms watched their bonds take another beating on Friday as the prospect of a wave of defaults in the sector in the wake of China Evergrande's troubles continued to scare off investors. Among a frenzy of developments, advisers for Evergrande bondholders said they had still not heard from the company following its recent missed bond payments. Smaller rival Fantasia appointed advisors after it shocked markets by also missing a payment this week, while both R&F Properties and Xinyuan suffered credit rating downgrades, the latter after it had asked to push back one of its own payments.