stove

Q: I purchased a brand-new stove last year from a Muslim brother who owns an appliance store. Two weeks ago, the thermostat blew. When the electrician opened the stove and was changing the thermostat, he noticed that the brand-new parts of the stove had been replaced with old, slightly damaged parts before it was sold to me. When I complained to the appliance store, they acknowledged the fault but were unhappy to give me a full refund because of the blown thermostat. What options do I have in Shari’ah?

Q: It is a general rule in most present day hotels that visitors booked in are not allowed to use a stove or any such appliance in the bag which may be a cause of a fire. Despite the above condition, a person still uses the appliance without it being detected by the hotel, will this be incorrect and be regarded as khiyaanat (deception)?