I would call to the solicitor if not getting an answer. It's though perfectly normal for it to take some time before the documentation will reach the bank. It's not looking like it's registry of deeds if you mention a folio, sounds messer than that, an old Registry of deeds being changed into the new Land registry and that new procedure caused years of delays in some cases.
At the end of the day your solicitor has signed an undertaking with your bank so you shouldn't be worried. But it's unacceptable not to get an update on progress. So by all means complain to the Law Society. I'd tell the solicitor by email you're going to do this if you don't get a response within say, two weeks.