Have you tried the Logo flash utility for the printer from below link.
TM Flash Logo Setup utility Ver.2.60Ec
It would be useful to show example of actual receipt print output,Printer Template and how you have configured the printer settings. You can refer to below link.
Printer Types
Ticket Printer: Native printing for ESC/POS compatible thermal or dot matrix printers.
Other Settings
Character Set: If your printer is ESC/POS compatible and you selected Ticket Printer type enter your printers language code here to support printing language specific characters.
RTL Support: Some ESC/POS compatible printers does not support RTL printing. In this case you can try fixing printer output by using this setting.