Hi,
It's not about support of HikaShop 2.5.0 ; it is that the plugin do not work like the HikaShop payment plugins are.
Please read the details I wrote in my previous message.
If you want to fix the plugin ; you have to contact the pay2go support so they will improve their plugin.
But we can't do anything in our side, it is all related to the plugin and his implementation.
And because it's not a plugin we made, we can't provide any kind of support for it.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.