Micro execrable quality inoperable after 48 hours

After 48 hours of normal use, the microphone fails and not transmitting anything. After a first return to the seller, a new product is sent to me and there still after 48 hours of normal use, the new micro breaks down and no longer transmits any sound.
A microphone in a deplorable quality should not even be considered in line with the sale.
Otherwise, the receiver works, but if you buy this handset, you should necessarily buy another microphone, which makes the quality / price very unfavorable to the consumer.