If your OCR is not increasing, even though you are completing orders, there could be a few reasons for this.
1. Your OCR may be low because of previous order cancellations.
Even if you are completing orders now, past cancellations can still affect your OCR. This is because OCR is calculated over a rolling period, so even if you have a good track record recently, it will take some time for your OCR to fully recover from any previous cancellations.
2. Some of your completed orders may not have been marked as complete.
In order for an order to count towards your OCR, it needs to be marked as complete by the buyer. If the buyer has not marked the order as complete, it will not count towards your OCR.