automatic failure

Greetings, friends, I need your opinion on a subject, I have a 1.6 xt automatic vehicle, it has been 2 months and I have been constantly getting automatic gear faults, solenoids have changed, oil pressure sensor has been changed, transmission oil has been changed, but nothing has changed in the breakdown, there is no limit to the cost I have destroyed, what could be the problem, I am going hard from home to work 10 It gives the same warning 5 times per km.

Connect it to the computer and get the error codes. It may be a sensor (speed, revolution) error, it may be a low pressure error, it may be a position selector switch.