There are a few things that seem off with your original sentence:
I would like to meet you at 5pm this Sunday in KFC on the first floor in USA Shopping center.
First, the order of adverbials is off. As the Cambridge dictionary says, adverbials of time should follow adverbials of place.
When there is more than one of the three types of adverb together, they usually go in the order: manner, place, time.
An example from there is:
James played brilliantly [manner] in the match [place] on Saturday [time]. (preferred to James played brilliantly on Saturday in the match.)
So in your sentence, the order of the adverbs needs to be reversed:
I would like to meet you in KFC on the first floor in USA Shopping center at 5pm this Sunday.
That is immediately much better. The two sets of adverbials are in the right order (place, then time).
Within each set, you have already arranged each of them from most specific to most general: 5pm is more specific than this Sunday, for example. You could choose to arrange from most general to most specific too: this Sunday at 5pm. But in that case you should probably rearrange the place adverbs too, to go from most general (USA Shopping Center) to most specific (KFC). That is a matter of preference and style rather than a rule per se. The way you have them arranged is fine.
The rest of the tweaks don't have to do directly with your question about the arrangement of adverbials, but are needed to make the sentence idiomatic. Consider the following conversation:
"Where did you eat?"
"The one on Foo Road?"
"No, the one in USA Shopping Center."
When you are specifying which KFC, you need the definite article. You can say I'll see you in KFC, but once you're narrowing it down to a specific one, you have to say I'll meet you in the KFC on the first floor.
I would like to meet you in the KFC on the first floor in USA Shopping center at 5pm this Sunday.
Next, idiomatically we say the nth floor of a building rather than in:
I would like to meet you in the KFC on the first floor of USA Shopping center at 5pm this Sunday.
Finally, is the name of the mall USA Shopping Center? If so, capitalize accordingly:
I would like to meet you in the KFC on the first floor of USA Shopping Center at 5pm this Sunday.
If the shopping center is called just USA, and you're adding the shopping center for disambiguation (the first floor of USA seems, um, rather vast) then you need to lose the capital S and add a definite article. It's a bit tricky to explain, but I'll try. Suppose I've been trying to choose between Harmon-Kardon and Bose speakers. Once I am sure, I might say:
I've decided to buy the Bose speakers.
Here, I'm using Bose to specify which speakers among the ones I was considering. Since it's a specification, I need the definite article. It works just like the green bag or some other specification using an adjective.
Similarly, if the mall is just named USA, you are specifying which shopping center, and its name functions adjectivally. So you would need the definite article:
I would like to meet you in the KFC on the first floor of the USA shopping center at 5pm this Sunday.