@PeterLa_2190512 What's most likely happened here is that some overseas call centre has spoofed their caller ID as a UK number to make people more likely to answer their calls, and you just happen to be the unlucky person whose number it happens to be on this occasion. This has got nothing to do with any security failing from Smarty, and the calls will not be coming from your account / through Smarty's infrastructure.
I had the same thing happen to me a while back, but not with Smarty, with my work landline number. A lady called and insisted I'd called her, and demanded to know my name. I told her my name was none of her business as I definitely hadn't called her. She eventually just huffed and hung up.
