My local 7/11 changes them, leave them there a while no probs never been cheated yet. 

1 hour ago, blackshadow said:

ever heard of or thought of going to a bank???!!!!!

Not all banks will accept B10k worth of small unsorted coins, as the OP has, unless they're to be deposited to an account.  

Villa has a sign at the cash registers begging for coins. They happily take my tonnage.

Another option is to take the coins to Big C Extra customer servicer desk upstairs and they'll gladly help you out, but best to sort and count them yourself first.