I didnt even do the welcome offer thought it wasnt even worth it for a £5 free bet.

have a look through these and see if it helps
https://matchedbettingblog.com/horse-racing/apollobet-newbies-cheltenham-2016-12-77-guaranteed-profit/#.VxK0a_krJ-U
https://matchedbettingblog.com/topic/apollobet-intro-offer/#.VxK0D_krJ-U

Because you are new to matched betting I would advise the most simple method.

Place your initial £5 bet as you would any other time using the calculator in qualifier mode.
so £5 @ 1.95 and lay @ 2.06 ( current odds ) this will give you a lay stake of £4.78 and a loss of £0.32 no matter what the result .

However because of the enhanced odds offer you should receive .

a- if leicester win then you will have your original stake £5 plus winnings of £4.75 in cash in your account . PLUS you will have £35 25 worth of free bets which you will have to place and extract as much as you can from these using the stake not returned method of betting.

b – if Leicester lose/draw you will have a free £5 bet to place using the stake not returned method in your account and your original £5 will be in smarkets – the qualifying loss.

You can guarantee yourself a profit of course but this method is a little more advanced and as you are just starting I would advise walk before you can run and make sure you understand what your doing first

Times the enhanced part of the odds (9-2 = 7) by 0.8 (extraction from free bet) then add to original odds 2

(9-2) X 0.8 + 2 = 7.6

Put these odds and the lay odds into the magic calculator