Hi, you seem a bit confused as to what to send and when. If you sent the SAR for your statements on the 17th April, they have 40 days to give you the information. You should also have sent a cheque or postal order for £10. After you have received the statements you should send them the preliminary letter requesting your money back and giving them 14 days to do it. after this you should send them the LBA - Letter Before Action giving them another 14 days. You probably won't have got your money back at this stage. The next step is to file in court, this gives them 14 days to say if they are going to defend the claim which they normally say they are going to do and if so they have a further 14 days to put in their defence. From experience the co-op pay out before having to put in a defence.The bit about having 8 weeks to look in to your original letter is a bit confusing. Normally this is sent out when they receive the preliminary letter and under FSA rules they have 8 weeks to deal with a complaint although this does not supercede the 14 day blocks as outlined above. As your request for statements is not a complaint I think that they have sent you those letters in error. They only have 40 days in which to give you the statements otherwise you can report them to the information commisioner. When you do get your statements follow the procedure abocve. Also always send communications by recorded delivery.
Hope it helps. If you need more info give me a shout.