There could be several reasons why the prints you made are not working while the ones made by the builder are successful. Here are a few troubleshooting steps you can try:
Check your slicing settings: Make sure you are using the correct slicing settings for your printer, such as the correct filament diameter, print speed, temperature, and layer height. Compare your settings to those used by the builder.
Verify your design files: Double-check that your design files are error-free and suitable for 3D printing. It's possible that there may be issues with the design itself if the builder's prints work fine. Use a 3D viewer or repair software to inspect and fix any potential issues.
Calibrate your printer: Ensure that your printer is properly calibrated. Level the bed, check the nozzle height, and calibrate the extruder steps if necessary. Inconsistent or incorrect calibration can lead to print failures.
Filament quality and storage: Ensure you are using good-quality fila...
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