Poor Quality Door Knobs

Front Door Handel falls off first day of moving in. Rear door Handel came off within first 30 days of move in. All door handles had to have some form of adjustments. Never have been 100% stable. All these knobs should be replaced with a higher quality knob. Locksmith who re-keyed the house and fixed the knobs commented they are some of the poorest on the market. Unresolved.