Engage credit (pepper )product transfer

marc3

I am landlord with buy to let mortgage-favourable terms just expiring .
mortgage with engage credit 
engage are a trading name of pepper mortgages .
Mge was taken out with pepper .
about 3 years ago pepper 'unilaterally' transferred it to engage .(terms unchanged allegedly )
i am considering a product transfer (yes i know rates are higher but over 2 years taking into account cost of solicitors/potential arrangement fees/my time costs  etc -there may not be that much difference than going with a new provider).

engage are not a lender .Pepper are .I did not ask to be transferred to their trading arm(engage ).
Pepper say they will not provide me with a quote as my mortgage not with them anymore .
I believe they should (as when transferring me to engage, terms were unchanged ).

(i do note that whilst pepper are regulated by fca-they have a disclaimer saying their buy to let mortgages are not ).
just seems both naughty -and actually wrong -but before i make a big issue of it-just wondered if anybody encountered similar and what are the true facts/rights in this situation .

look forward to hearing some fact based  views.thank you   

marc3

semi answering my own question -there seems a lot of 'wriggling' going on here  -in so far as Pepper itself is split into 'two'.Pepper money who are a lender it seems and Pepper UK who are not a lender who Engage are the trading name of .
has anyone else encountered Pepper and this /similar scenario .

we'll re mortgage with someone else anyway-but just seems to much wriggling going on and i dont take to companies who may not be quite as  straightforward as one would wish -but in fairness-it could equally be me .

just interested if anyone else come across this