Fix Bugs in Existing POS

I'm in need of a skilled developer with experience in POS systems to help rectify some bugs.

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I want to develop some new modules for my system. I want to add payment gateway, HRM, woocommerce modules to my system.

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Here, the time of all sales is updated every time the POS receipt is checked. That is, the exact time of the transaction changes when the POS receipt is checked.

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Also, even if I delete the sales in all sales, the total of previous sales appears in the User Transactions, Z reports at the end of the day. That is, the old history also appears here.

Ideal Skills:
- Experience with POS system troubleshooting
- Proficiency in software debugging
- Excellent problem-solving skills
- Ability to work under pressure
- Good communication skills