redrose59

I'm hoping that the collective experience and knowledge of all on here can maybe shed some light on what may have happened and if there is anything we should be doing to follow up on this issue. I'll try to be brief whilst stating the timeline of events so that the situation can be understood and facts known.

27/04/2017 (355 days) Booked via BAEC website ABZ to JNB with a 2-4-1 companion voucher. Paid £392.32 per pax. Booked in CW.
19/05/2017 (355 days) Booked via Japan call centre ( at 1am ) over the phone to add inbound, JNB to LHR. Advised to call UK call centre to confirm and pay necessary taxes etc as they did not have the information.
19/05/2017 Phoned UK call centre and paid £191.50 per pax.
20/05/2017 (355 days) Booked LHR to ABZ via UK call centre. Booked in CE.
13/06/2017 Booked seat selection via BAEC/MMB for outbound LHR-JNB. Paid £99 per pax
17/03/2018 Booked seat selection via BAEC/MMB for inbound JNB-LHR. Paid £95 per pax
We had confirmation emails from BA regarding all of the above and all the above amounts were applied to our BA Am Ex credit card. The bookings showed in MMB as confirmed. The only change to the original booking was a ten minute departure time change on the ABZ -LHR and LHR-ABZ legs.

Our Outbound flights went off without any problems.

On the Inbound flights we were able to check in online at 24 hours but only for the JNB-LHR leg. Once we got to OR Tambo we were informed at the check in desk that the LHR-ABZ leg had not been ticketed so we would have to go to the BA service desk for it to be ticketed. The gentleman at the desk called BA in the UK ( that is what we understand to be the case). Eventually the leg was ticketed but we were informed that as we hadn't paid for this part of the journey that we would have to pay £383 in total. I was sure that we had paid all necessary fees but as I didn't have access to bank statements etc couldn't prove it at that point. We paid the £383 via our Am Ex BA card as we just wanted to make sure we got home. We recieved a confirmation email from BA stating how much we had paid . On the confirmation email where there is a box for Voucher Type it states "Gold Upgrade Voucher". I don't quite understand why this is so, we used a 2-4-1 and are just Blue cards.
After we had landed at LHR we popped to the BA ticket/enquires desk to see if they could shed any light onto the matter. The 3 members of staff who looked at our booking were somewhat confused by what had happened, they were very helpful and really tried to get to the bottom of why we had been charged in this way. They spoke with the BAEC but still couldn't get a satisfactory answer. We were asked if we had made any changes to our booking which we hadn't.
The staff at LHR advised us to contact Customer Relations via email setting out the facts. We have done this and are now waiting a response.
We have noticed that our credit card has two charges of £93.32 applied to it, plus one for £1 from BA. There is no charge of £383.

Any help or advice would be much appreciated. We are somewhat confused to say the least. Have we done everything that we can at this point?