Uh oh! You were not advised to use the MCOL to submit your defence. You were given specific advice on sending the defence by email for a reason.
The Money Claim Online (MCOL) website imposes a defence character limit of 122 lines of text, with up to 45 characters per line, including spaces and punctuation. This equates to a total character limit of approximately 5,500 characters, though exact limits depend on how the text is formatted.
Besides losing all the formatting, you have no idea if all of it went through because of the limits. Assuming you didn't include the header information from the defence and only the body text and the text from the draft order, the text, formatted to 45 characters per line, comes to 4,756 characters and spans 130 lines. So, your defence and order have been truncated by at least 8 lines.
As mentioned above, the draft order will not be visible and the defence is screwed. Your only hope now is that they discontinue anyway, which is still a likely outcome considering they don't actually read the defence.