On 17/03/2023 at 18:20, I was shopping with my partner at Lidl, Tawney Street in Boston. The security guard denied us drinks when we requested age verification despite the fact that we looked over the legal age, this was not the problem, however, he then sarcastically said with an attitude that he's just doing his job, which we found rude. Upon scanning the remaining products, my partner realized she had left her card in the car and asked if she could leave her shopping in the self-checkout while she retrieved it. he then told her to wait as he was on his phone. Then when he finished he started accusing us of trying to shoplift and made us re scan everything without a fair reason. He gave us a lot of attitude and came across like he was getting some sort of power trip from it. As we were leaving he then proceeded to tell the other staff members that we were shoplifting. He was extremely discourteous, uninviting and disheartening to say the least. I have honestly never received such poor customer service in my life. This is a shame as we have never had prior issues with this store but now feel we cannot shop here any longer.