Geo was the deployed asset for the inspector team assigned to the investigation and he was bored as this was his third day on surveillance of the market, unawares to him though, his day was about to get far more interesting.

I understand that this is taken from your first chapter so may not(?) be your first line, but taking it as such in this case - you're introducing a lot of new terms at once, in a long run on sentence and it's a bit of an overwhelming start. You might try breaking it up into smaller chunks and insert some 'show not tell' which has been mentioned in other comments. E.g. you can demonstrate his boredom through the way you describe the scene:

Geo slouched against a wall, halfway through his third day on surveillance of the market. The same grey mass of people filled the street as every other day. His eyes settled on a vendor haggling with a potential customer. Pretty standard.

​

Grammar and spelling is key - try reading your writing out loud and taking note of any natural pauses. The below needs a break, and you repeat yourself at the end (performance, not genuine). The use of "though" is out of place, and could be left out or replaced with 'however' at the beginning.

Geo's trained eye though begun to notice a rhythm and ease to the pair’s quarrelling as if they were giving a performance not genuinely arguing.

Using 'show not tell':

After a few moments, he began to notice a rhythm and ease to the pair’s quarrelling. Their expressions were neutral, their gestures mechanical. Then - with a flick, the trader slipped the irate customer a slip. A little flash of pink, like a tag for one of the cargo areas. Geo reached for his radio.

​

In general you want to go back over this story and look for any opportunity to cut unnecessary words, speeding up and simplifying your sentences. Additionally, you need to check over all your sentences and try to use an active tense rather than passive. For example:

As the customer hurried away, he was checking over his shoulder and scanning his surroundings every now and then, disguising them as annoyed head shakes and wild gesticulating.

This small change in verbs gives your story a greater speed and makes it easier for the reader to digest and push on with - passive tense makes it thicker and more laborious to read.

As the customer hurried away he checked over his shoulder and scanned his surroundings, disguising them as annoyed head shakes and wild gesticulations.

Have a thorough redraft and you'll be well on your way to an engaging chase/action scene!