As I've said, you don't (electrically speaking) need a smart meter for either of those things. Some suppliers may (as a form of 'blackmail') only offer certain tariffs to people with smart meters (so, as below, you might need to shop around suppliers) but there are plenty of people (like me) who have dual-rate tariffs with a 'dumb' meter (and, indeed, did when the meters were all electro-mechanical) and I'm pretty sure that there are also people who have export metered by a 'dumb' meter'.
It sounds as if your problem is specifically with your supplier and, although there is currently no financial benefit to be had by 'switching', it sounds as if you would do well to consider switching to a more sensible/helpful supplier.
Kind Regards, John