First of all for any reason, Society cannot disconnect essential services for any default. And same is held by courts in Indian that society are not supposed to cut electricity or water supply till they have a permission from the statutory authority. Buyers can also go to the Registrar of Societies and file a complaint in case RWAs do not work as per the by-laws or violate any law in its functioning.
Rent is another thing, Landlord is entitle to rent. Lock down has not effected right to receive rent except no force eviction.
Only retrieve would have been FM clause.