Why is my Arduino Uno not making my project behave like the uploaded code?

I have a CH340g driver Chinese derivative of the Arduino Uno. I installed the CH340g driver as per advice from the Quora community. It says the compiling and upload was successful and complete (the Tx and Rx blink while uploading and the L led stays lit when the upload is complete), my wiring and connections are also correct.

Then why is my project not behaving as per the code?Do I need to get an original Arduino Uno? Is mine faulty?Please help, it would be greatly appreciated!! I need it asap for my junior project!!

The Arduino Uno I have

I tried making a dual axis solar tracker, and it uses 4 LDRs (mounted over the head of the solar panel) & 2 mg996r servo motors (which provide 360° continuous rotation, used one as a vertical one and the other as horizontal).

I expect it to face the solar panel towards the direction of greater light intensity.

Here's the code:

#include <Servo.h>Servo servohori; //horizontal servo(BOTTOM SERVO)int servoh = 0; //assign servo at 0 degreeint servohLimitHigh = 180; //maximum range of servo is 180 degree(it is variable you can also change)int servohLimitLow = 10;   //minimum range of servo is 10 degree(it is variable you can also change)Servo servoverti; //vertical servo(TOP SERVO) int servov = 20; int servovLimitHigh = 180;int servovLimitLow = 10;int ldrtopr = 1; //top right LDR A1 pinint ldrtopl = 2; //top left LDR A2 pinint ldrbotr = 0; // bottom right LDR A0 pinint ldrbotl = 3; // bottom left LDR A3 pin void setup ()  {  servohori.attach(10); //horizontal servo connected to arduino pin 10  servohori.write(0);  servoverti.attach(9); //vertical servo connected to arduino pin 9  servoverti.write(0);  delay(500); //delay }void loop(){  servoh = servohori.read();  servov = servoverti.read();  int topl = analogRead(ldrtopl); //read analog values from top left LDR  int topr = analogRead(ldrtopr); //read analog values from top right LDR  int botl = analogRead(ldrbotl); //read analog values from bottom left LDR  int botr = analogRead(ldrbotr); //read analog values from bottom right LDR  int avgtop = (topl + topr) / 2; //average of top LDRs  int avgbot = (botl + botr) / 2; //average of bottom LDRs  int avgleft = (topl + botl) / 2; //average of left LDRs  int avgright = (topr + botr) / 2; //average of right LDRs  if (avgtop < avgbot)  {    servoverti.write(servov -1);    if (servov > servovLimitHigh)      {       servov = servovLimitHigh;     }    delay(8);  }  else if (avgbot < avgtop)  {    servoverti.write(servov +1);    if (servov < servovLimitLow)  {    servov = servovLimitLow;  }    delay(8);  }  else   {    servoverti.write(servov);  }  if (avgleft > avgright)  {    servohori.write(servoh -1);    if (servoh > servohLimitHigh)    {    servoh = servohLimitHigh;    }    delay(8);  }  else if (avgright > avgleft)  {    servohori.write(servoh +1);    if (servoh < servohLimitLow)     {     servoh = servohLimitLow;     }    delay(8);  }  else   {    servohori.write(servoh); // write means run servo  }  delay(50);}