You are not alone weve been there.
Now you are aware of the reason why the water is not flowing down the drain.
This method is actually straightforward.

Image by: AfterTap
Next time you encounter this situation again, you might fix it on your own.
Heres how to clean a clogged drain easily using natural products byAfterTapon Youtube.
Read on for the full instructions.

Once boiling, pour it into your drain, so the grease will not harden.
Just throw the grease into the trash.
Step 2:
Put 2 and 1/2 cups of baking soda into your drain.

Step 3:
Pour half a cup of white vinegar.
Dissolve the baking soda using white vinegar.
You will hear a chemical reaction.
This will remove the grease on your drain.
Let it sit for 10 minutes.
Step 4:
Pour 4 to 6 cups of hot water down your drain.
Try not to use the sink for a little bit to a few hours after this.
Note: double-check you are not doing this after a chemical method.
The baking soda and vinegar can produce a bad reaction with the chemicals.