Bad service I've received from TFG online

0n the 06/05/21 I've ordered a Woman's Navy 3 Strap Set Watch online which was priced R119.99 and requested it to be delivered in Bellville, on the 11/05/21 went to collect my parcel to my suprise I only received a single watch instead of a 3 strap set. So I contacted the call centre and gave them my order number to check and they confirmed it was supposed to be a set and they advised that I must go back to the shop to do an exchange and get the correct item as it was described online. When I got to the shop I explained and even showed them the proof of what was advertised online and the lady who was assisting me she said it was an error because the watch ⌚is R119.99 not a set so she just gave me a refund without even asking me anything. So because I wasn't happy with the attitude that I was given I took the money though I didn't wanted the refund but the watch and made several phone calls to their contact centre to tell them how disappointed I was, they referred me back to the shop and said I must request either the manager or anyone to make a call to their contact centre but unfortunately nobody did that but took my details and promised to give me a call when their manager is in the office up to date nothing happened. So I contacted them again to lodge a complaint and I was promised again I will receive a call after 3 days it didn't happen and 25/05/21 received a message that my query was resolved and gave me R50 voucher. On the 30/05/21 I wrote an email to them an express my feelings about this situation up to date I haven't received any feedback because I still need the 3 strap set as it was advertised.